H. Junjappa

发表

Highly regioselective 1,2-addition of alkoxybenzyl Grignard reagents to α-oxoketene dithioacetals: A facile regiocontrolled synthesis of alkoxynaphthalenes and their condensed analogs via aromatic annelation

H. Ila, S. Nandi, B. K. Mehta, 1999 .

Regioselective synthesis of substituted 1-methyl- and 2-methylnaphthalenes

H. Ila, H. Junjappa, K. Yadav, 1996 .

Efficient Routes to Acenaphthylene‐Fused Polycyclic Arenes/Heteroarenes and Heterocyclic Fluoranthene Analogues

K. Panda, H. Ila, H. Junjappa, 2005 .

Base catalyzed reaction of ethyl thioglycolate with β-aryl-β-(methylthio) acroleins: a general method for the synthesis of 2-carbethoxy-5-substituted/4,5-annulated thiophenes in high overall yields

H. Junjappa, M. P. Sadashiva, G. Gowda, 2016 .

A new general method for the synthesis of thiophenes through acid mediated cyclization of mixed acetals derived from β-oxodithiates and bromoacetaldehyde acetal

H. Junjappa, M. P. Sadashiva, G. Gowda, 2016 .

In vitro screening of potential anti-cancer chemicals: effect of purine pyrimidine analogues on seed germination.

C. Dwivedi, H. Junjappa, C. R. Krishna Murti, 1981, Toxicology.

[4 + 2] cycloaromatization of 4-bis(methylthio)-3-buten-2-one with active methylene ketones: a simple and facile phenol annulation.

O. Barun, K. Panda, H. Ila, 2002, The Journal of organic chemistry.

α-Oxoketene-S,S-, N,S- and N,N-acetals: Versatile intermediates in organic synthesis

H. Ila, H. Junjappa, C. V. Asokan, 1990 .

Heteroannulation of nitroketene N,S-arylaminoacetals with POCl3: a novel highly regioselective synthesis of unsymmetrical 2,3-substituted quinoxalines.

H. Ila, H. Junjappa, P. K. Mahata, 2005, Organic letters.

4,4-Dimethoxy-2-butanone as 1,3-Dielectrophylic 3-Carbon Building Block: New Route for the Synthesis of Toluene, o-Xylene, Naphthalenes and Pyrimidines

H. Junjappa, N. Ramesh, T. P. Charanraj, 2018 .

Base catalyzed reaction of 1,4-dithiane-2,5-diol with α-oxoketene dithioacetals: a new general method for the synthesis of 2-methylthio-3-aroyl/heteroaroyl thiophenes

H. Junjappa, M. P. Sadashiva, G. Gowda, 2016 .

Fluorination of α-oxoketenedithioacetals: one-pot four-component synthesis of α-fluoro-α-oxoketenedithioacetals

H. Junjappa, N. Ramesh, T. P. Charanraj, 2016 .

Synthesis of Novel Substituted Phenanthrenes and Polycyclic Heteroarenes by Pd-Catalyzed, Direct, Intramolecular Arylation/Heteroarylation

A. Yadav, H. Ila, H. Junjappa, 2010 .

Heteroaromatic annulation studies on 10,11-dihydro-11-[bis(methylthio)methylene]dibenzoxepin-10-one: a facile access to novel dibenzoxepino[4,5]-fused heterocycles

H. Ila, H. Junjappa, Sarvesh Kumar, 2007 .

α-Oxoketene dithioacetal mediated aromatic annulation: highly efficient and concise synthetic routes to potentially carcinogenic polycyclic aromatic hydrocarbons

K. Panda, H. Ila, S. Nandi, 2004 .

α-Oxoketene dithioacetals mediated heteroaromatic annulation protocol for benzoheterocycles: an efficient regiocontrolled synthesis of highly substituted and annulated indazoles

S. Peruncheralathan, H. Ila, T. A. Khan, 2004 .

1-Bis(methoxy)-4-bis(methylthio)-3-buten-2-one: useful three carbon synthon for synthesis of five and six membered heterocycles with masked (or unmasked) aldehyde functionality

H. Ila, H. Junjappa, P. K. Mahata, 2003 .

Studies on regioselective addition of benzylic organometallics to α-oxoketene dithioacetals in our aromatic annelation protocol

O. Barun, H. Ila, H. Junjappa, 2001 .

Chapter 1 – The Junjappa-Ila (JI)-Heteroaromatic Annulation: A New General α-Oxoketene Dithioacetals Mediated Inverse Method for the Synthesis of Benzo/Condensed Heterocycles and Related Heteroaromatization Processes

H. Ila, H. Junjappa, P. Mohanta, 2001 .

α-Oxoketene Dithioacetals Mediated Benzoannelation of Aromatic Heterocycles: an Efficient Regiocontrolled Synthesis of Highly Substituted and Polycyclic Benzo[b]thiophenes

O. Barun, H. Ila, H. Junjappa, 2000 .

Synthesis and reactions of 2-bis(methylthio)methylene-1-methyl-3-oxoindole: A facile access to benzo- and heterocyclo-fused carbazoles and indoles

M. V. Rao, H. Ila, H. Junjappa, 1999 .

Preparation of lithium 5-lithiomethy-3-methylpyrazole-1-carboxylate and its reaction with α-oxoketene dithioacetals: A new general method for substituted and annelated pyrazolo[1,5-a]pyridines

H. Ila, H. Junjappa, J. Suresh, 1999 .

An expeditious synthesis of substituted and annelated pyrido[2,3-b]indoles

O. Barun, H. Ila, H. Junjappa, 1999 .

A new regiospecific method for the synthesis of substituted phenanthridines and benzo[j]phenanthridines via aromatic annelation of 1-N-benzenesulfonyl-3-[bis(methylthio)methylene]-1,2,3,4-tetrahydroquinoline-4-one

H. Ila, H. Junjappa, J. Suresh, 1998 .

Benzoannelation of 2-methylindole via 1-N-carboxy-2-methylindole dianion: A direct regiospecific route to substituted and annelated carbazoles

H. Ila, H. Junjappa, U. K. S. Kumar, 1998 .

Lewis acid induced tandem carbocationic ring opening and cyclizations of α-[bis(methylthio)methylene]ethyl-2-styrylcyclopropyl ketones and carbinols: Novel approach to bicyclo[3.3.0]octene and cyclopent[a]indene frameworks

H. Ila, H. Junjappa, P. Patra, 1998 .

A new general regiocontrolled synthesis of highly substituted and condensed indoles via heteroaromatic annelation

H. Ila, H. Junjappa, J. Suresh, 1997 .

An Expedient New Synthesis of Substituted Carbazoles via α-Oxoketene Acetals through Heteroaromatic Annelation Methodology

H. Ila, H. Junjappa, J. Suresh, 1997 .

Reaction of lithioamino anions with α-oxoketene dithioketals: an improved and a new general method for the synthesis of α-oxoketene S,N- and N,N-ketals

O. Singh, H. Ila, H. Junjappa, 1997 .

Trimethyl borate induced thermal cycloaromatization of 1-aryl-1-(prop-2-ynyl)-3,3-bis(alkylthio)-2-propen-1-ols through acetylenic oxy-cope rearrangement

S. Samal, H. Ila, H. Junjappa, 1996 .

Stepwise Controlled Reduction of a-Oxoketene Dithioacetals with Zn/ZnCI2-TMEDA in Ethanol

B. Patro, H. Junjappa, K. Yadav, 1996 .

Regiospecific generation and application of 3-lithiomethyl-2-methyl-1-phenylpyrazolin-5-one as 1,3-binucleophile in aromatic annelation: A novel approach for synthesis of 1,2-disubstituted indazolones and their condensed analogs

A. Roy, H. Ila, H. Junjappa, 1995 .

α-Oxoketene Dithioacetals as Intermediates for Aromatic Annelation

H. Ila, H. Junjappa, 1994 .

Highly diastereoselective anionic [3 + 2] annulation strategy for functionalized cyclopentenes viaα-oxoketene dithioacetals

H. Ila, H. Junjappa, K. R. Reddy, 1994 .

Tandem carbocationic cyclization of bis(methylthio)methylene arylcyclopropyl ketones : A promising sequence for assembling functionalized cyclopent[a]indene framework

B. Patro, H. Ila, H. Junjappa, 1993 .

Cyclocondensation of α-hydroxyimino-β-alkyl/arylimino-β-methylthioketones with hydrazine hydrate: synthesis of 3(5)-aryl-5(3)-alkyl/arylamino-4-nitroso (or amino) pyrazoles

H. Ila, R. Chakrasali, H. Junjappa, 1993 .

Cycloaromatization of α-oxoketene dithioacetals with enaminone derived carbanions

H. Ila, H. Junjappa, K. R. Reddy, 1992 .

Regioselective synthesis of 3(or 5)‐styryl‐/(4‐aryl‐1,3‐butadienyl)‐/(6‐aryl‐1,3,5‐hexatrienyl)‐5(or 3)‐(methylthio)isoxazoles and pyrazoles via α‐oxoketene dithioacetals

B. Patro, H. Ila, H. Junjappa, 1991 .

α-Oxoketene-S,S-, -N,S- and -N,N-acetals: Versatile Intermediates in Organic Synthesis

H. Ila, H. Junjappa, C. V. Asokan, 1990 .

Studies on diels-alder cycloadditions of vinylketene dithioacetals

A. Gupta, H. Junjappa, H. Ila, 1989 .

Regioselective synthesis of 5-alkylthio- and 3-alkylthioisoxazoles from acylketene dithioacetals

H. Ila, H. Junjappa, M. L. Purkayastha, 1989 .

Reaction of polarized ketene S,N-acetals with bromoacetaldehyde diethyl acetal: synthesis of 1-substituted 3-acyl- and 3-nitro-2-methylthiopyrroles and 1,2-annulated 3-acylpyrroles

H. Ila, R. Chakrasali, H. Junjappa, 1989 .

Reaction of acylketene S,N-acetals with malonyl chloride: synthesis of novel 1,5-substituted 4-hydroxy-6-methylthio-2(1H)-pyridones and 6,8-substituted 4-hydroxy-7-methylthio-2,5-dioxo-5,6-dihydro-2H-pyrano[3,2-c]pyridines

H. Ila, R. Chakrasali, H. Junjappa, 1988 .

Cyclocondensation of acylketene S,N- and N,N-acetals with maleic anhydride and maleimide: a facile one-step synthesis of pyrano [3,4-c]pyrrole, pyrrolo [3,4-c]pyridine and condensed pyrrole derivatives

H. Ila, H. Junjappa, A.K. Gupta, 1988 .

Polarized ketene dithioacetals. Part 65. Studies on additions of 2-aroyl-3-cyano-1,1-bis(methylthio)propenide anions to hetero-multiple bonds

H. Ila, H. Junjappa, L. Singh, 1988 .

Cycloaromatization of ∝-oxoketene dithioacetals with 3-methyl-5-lithiomethylisoxazole: A new general approach for synthesis of substituted and annelated 1,2-benzisoxazoles☆

H. Ila, H. Junjappa, M. P. Balu, 1988 .

Reformatsky Reaction on Aroylketene S,N-Acetals: A Facile Route to 4-Amino-6-aryl-2H-pyran-2-ones

A. Datta, H. Ila, H. Junjappa, 1988 .

Studies on lead tetraacetate oxidation of α -oxoketene S,N- and N,N-acetals1

Abraham Thomas, H. Ila, J. N. Vishwakarma, 1988 .

Cycloaddition of Sodium Azide to Polarized Ketene S,S- and S,N-Acetals: Synthesis of Novel Substituted Triazole and Tetrazole Derivatives

H. Ila, R. Chakrasali, H. Junjappa, 1988 .

Cycloaddition of Aroyl/Acylketene S,N-Acetals with Tosyl Azide: Synthesis of Novel 4-Aroyl/Acyl-5-amino-1H-1,2,3-triazoles and 3,4-Annulated 1,2,3-Triazoles

H. Ila, R. Chakrasali, H. Junjappa, 1988 .

Acid catalyzed ring opening of α-bis(methylthio)methylenealkyl cyclopropyl ketones: an intramolecular alkylation approach to substituted cyclopentanones

H. Ila, H. Junjappa, C. V. Asokan, 1988 .

Novel cycloaromatization in reformatsky reaction on ∝-oxoketene dithioacetals: A regioselective synthesis of substituted ethyl 2-hydroxy-6-methylthiobenzoates☆

A. Datta, H. Ila, H. Junjappa, 1988 .

Polarized ketene S,S- and S,N-acetals. Part 52. Lead tetra-acetate oxidation of 3-anilino-3-methylthio-2-arylacrylonitriles. A novel approach to substituted indoles

Abraham Thomas, H. Ila, J. N. Vishwakarma, 1988 .

A facile route to 5-alkyl-1,1-bis(methylthio)penta-1,4-dien-3-ones

H. Ila, H. Junjappa, C. V. Asokan, 1988 .

Synthesis of methyl 5-aryl-3-oxo-4-pentenoates and novel substituted cyclopentenones

H. Ila, H. Junjappa, C. V. Asokan, 1988 .

Cycloaromatization of α-oxoketene dithioacetals with lithioacetonitrile: A facile route for 4-substituted and 4,5-annelated pyridines

A. Gupta, H. Ila, H. Junjappa, 1988 .

A Novel Route to Methyl 3-(3,4-Disubstituted 5-alkylthio/amino-2-thienyl) propenoates

A. Datta, H. Ila, H. Junjappa, 1988 .

Polarized Ketene Dithioacetals; 71.1 Synthesis of 2,5-Substituted 3-Bis(methylthio)methylenetetrahydrofurans

A. Datta, H. Ila, H. Junjappa, 1988 .

Polarized Ketene Dithioacetals; 60.1 Synthesis of Novel 6-Aryl- 5-bis(methylthio)methyl-3(2H)-pyridazinones

H. Ila, H. Junjappa, L. Singh, 1988 .

Polarized Ketene Dithioacetals; 55:1 Synthesis of Novel 5-Aryl-2-methylthio-4H-pyran-4-ones from Cinnamoylketene Dithioacetals

H. Ila, H. Junjappa, C. V. Asokan, 1987 .

Cycloaromatization of α-oxoketene dithioacetals with 2-picolyllithium: a facile quinolizinium cation annelation

H. Ila, H. Junjappa, M. P. Balu, 1987 .

Synthesis of Novel 2-Amino-4-aryl-5-arylthio-6-methoxypyrimidines and 3(5)-Aryl-4-arylthio-5(3)-methylthiopyrazoles via α-Oxo-α-arylthioketene dithioacetals

G. Singh, H. Ila, H. Junjappa, 1987 .

A facile general route to 2,2-disubstituted 5-alkylthio-4-aroyl-2H-imidazoles

H. Ila, H. Junjappa, D. Pooranchand, 1987 .

A novel route to stilbenes via cationic cycloaromatization

H. Ila, H. Junjappa, C. V. Asokan, 1987 .

Aromatic annelation via ∝-oxoketene dithioacetals:synthesis of thioresorcinol dimethyl ethers

A. Gupta, H. Ila, H. Junjappa, 1987 .

Polarized Ketene Dithioacetals; 53:1 A Facile Synthesis of 2-Aryl-6-methylthio-4H-pyran-4-ones and a Novel Cycloaromatization Reaction

H. Ila, H. Junjappa, L. Singh, 1987 .

Polarised ketene dithioacetals. Part 50. Reactions of α-aroyl-α-bromoketene dithioacetals with hydrazine hydrate: formation of rearranged pyrazoles

H. Ila, G. Singh, H. Junjappa, 1987 .

Polarized ketene dithioacetals 63 : Stereoselective synthesis of α-ylidene-γ-butyrolactones

A. Datta, H. Ila, H. Junjappa, 1987 .

Cycloaromatization of δ-oxoketendithioacetals with benzylmagnesium chloride: A novel naphthalene annelation reaction

G. Singh, H. Ila, H. Junjappa, 1986 .

Reactions of α-Oxoketenedithioacetals with Phenylmagnesium Bromide: Synthesis of Novel 1-Phenyl-1-methylthio-3-phenyl (or 2,3-Fused)-indenes and 2,3-Fused Heterocyclic-1,3-Diphenyl-2-alken-1-ones

G. Singh, H. Ila, H. Junjappa, 1986 .

Polarized ketene dithioacetals. Part 42. Studies on the reactions of alkyl and aryl Grignard reagents with α-oxoketene dithioacetals

G. Singh, H. Ila, H. Junjappa, 1985 .

A facile synthesis of substituted 6-amino-2-methylthio-4H-thiopyran-4-ones

H. Ila, H. Junjappa, L. Singh, 1985 .

Reformatsky reaction on α-oxoketene S,S-acetals: synthesis of novel polarized vinylketene S,S-acetals and dimethyl 2-aryl(methyl)-propene-1,3-dicarboxylates

A. Datta, H. Ila, H. Junjappa, 1985 .

Bromination of α-aroylketene S,S-acetals: synthesis of novel α-aroyl-α-bromoketene S,S-acetals and their further synthetic transformations

G. Singh, H. Ila, H. Junjappa, 1985 .

Polarized ketene dithioacetals. Part 41. Studies on base-catalysed rearrangements of 1,l-bis(alkylthio)-2-aroylpenta-1,4-dienes to novel 1,5-bis(alkylthio)-2-aroylpenta-1,3-dienes via a 1,5-alkylthio shift

H. Junjappa, S. Apparao, S. Bhattacharjee, 1985 .

A Facile and Convenient Synthesis of Methyl 7-Aryl-2,4,6-heptatrienoates

H. Ila, H. Junjappa, C. V. Asokan, 1985 .

ketendithioacetals 39. Novel solvolytic rearrangements of 1,1-bis-(methylthio)-2,4-dimethyl-5-aryl (or styryl)-1,4-pentadien-3-ols to cyclopentenone derivative

H. Ila, H. Junjappa, C. V. Asokan, 1985 .

A Facile Synthesis of 2-Amino-4-alkoxy-6-styryl- and 2-Amino-4-alkoxy-6-(4-aryl-1,3-butadienyl)-pyrimidines by Direct Cyclocondensation

H. Ila, H. Junjappa, A.K. Gupta, 1984 .

Reactions of polarized ketoketene S,N-acetals with thionyl chloride: a novel general route to 1-aroyl-(or -acyl)-2-aryl-(or -ethoxycarbonyl)-4-alkylthiothiazoles by direct heterocyclization

H. Ila, H. Junjappa, A. Rahman, 1984 .

Reaction of cyanotrimethylammonium methylid with dialkyl trithiocarbonates: a facile synthesis of 3,3-bis [alkylthio] acrylonitriles

H. Ila, H. Junjappa, S. Bhattacharjee, 1984 .

Reaction of α-ketoketene S,N-acetals with hydroxylamine: a facile general route to 5-aryl-3-(N-arylamino, N-alkylamino, or N-azacycloalkyl)-isoxazoles

H. Ila, J. N. Vishwakarma, H. Junjappa, 1984 .

A Novel, General Method for the Synthesis of 2-Methyl-Substituted and 2-Unsubstituted Methyl 5-Aryl-2,4-pentadienoates

B. Myrboh, H. Ila, H. Junjappa, 1984 .

Polarised ketene dithioacetals. Part 32. Studies on base-catalysed rearrangements of 2-bis(methylthio)methyleneindan-1-one, 2-bis(methylthio)methylene-1-tetralone, and 3-bis(methylthio)methylene-2,3-dihydro-1-benzothiopyran-4-one

A. Datta, H. Ila, H. Junjappa, 1984 .

Cationic benzoannelation of active methylene ketones via oxoketendithioacetals

H. Ila, H. Junjappa, Gurdeep Singh, 1984 .

Synthesis of novel functionalized hydroxyiminoimines by direct nitrosation of β-thio-β-amino-α,β- unsaturated ketones and their further transformations: new general syntheses for imidazole, quinoxaline, and thiazole derivatives

H. Ila, H. Junjappa, Aziz-Ur-Rahman, 1984 .

Polarized ketene dithioacetals. XXVIII: A new general highly stereoselective and regiospecific method for homologation of ketones to α,β-unsaturated esters via α-oxoketene dithioacetals

B. Myrboh, H. Ila, H. Junjappa, 1983 .

REARRANGEMENT STUDIES ON S-PROPARGYL-N-AZACYCLOALKYL ACETALS: SYNTHESIS OF NOVEL 3-AROYL-2-(N-AZACYCLOALKYL)-4-METHYLTHIOPHENES

H. Ila, H. Junjappa, S. Bhattacharjee, 1983 .

Reaction of Polarised α-Ketoketene N,N-Acetals with Dimethyl Acetylenedicarboxylate: Synthesis of Novel 5-Aroyl-1-aryl-6-arylamino-4-methoxycarbonyl-2-oxo-1,2-dihydropyridines

H. Ila, H. Junjappa, V. Aggarwal, 1983 .

Polarized ketene dithioacetals. Part 26. Studies on base-catalysed rearrangements of 3,3-bis(alkylthio)-2-methyl-1-arylprop-2-en-1-ones and 3,3-bis(methylthio)-2-benzyl-1-phenylprop-2-en-1-one

H. Ila, H. Junjappa, S. Apparao, 1983 .

Keten dithioacetals. Part 22. Reaction of polarised ketoketen dithioacetals with dimethyl acetylenedicarboxylate

H. Ila, J. N. Vishwakarma, H. Junjappa, 1983 .

Partial Reductive Demethylthiolation of a-Ketoketene S,S-Acetals with Sodium Borohydride/Nickel Chloride: A New, General Method for 2-Methylthio-1-alkenyl Ketones

B. Myrboh, H. Ila, H. Junjappa, 1982 .

Reaction of α-ketoketene S,N-acetals with cyanoacetamide: a new general method for substituted and fused 4-(N-alkylamino-, N-arylamino-, or N-morpholino)-3-cyano-2(1H)-pyridones

G. Singh, H. Ila, H. Junjappa, 1982 .

A Facile, One-Step Synthesis of 3-Alkyl- or 3-Aryl-4-methyl-2-(substituted-methylene)-2,3-dihydro-1,3-thiazoles

H. Ila, H. Junjappa, C. V. Asokan, 1982 .

Reaction of 2-Alkylthiomethyl-3-alkylthioacrylophenones with Hydrazine, Guanidine, and Amines: Synthesis of Novel Pyrazoles, Pyrimidines, and Enaminoketones

H. Ila, H. Junjappa, A. Rahman, 1982 .

Base catalysed rearrangement of 2-methyl-3,3-bisalkylthioacrylophenones to 2-alkylthiomethyl-3-alkylthioacrylophenones via mobile keto allyl intermediates

H. Ila, H. Junjappa, A. Rahman, 1982 .

Reactions of polarized ketene S,N- and N,N-acetals with benzoyl isothiocyanate: synthesis of novel 1-n-aryl(alkyl)-2-phenyl-5- aroyl-6-methylthio(n-alkylamino)-4-thioxopyrimidines

H. Ila, H. Junjappa, V. Aggarwal, 1982 .

Polarized Ketene N,N- and S,N-Acetals as Novel Enamine Components for the Nenitzescu Indole Synthesis

H. Ila, H. Junjappa, V. Aggarwal, 1981 .

A New, General Synthesis of 1-Substituted 2-Amino-4-aroyl-5-methylthiopyrroles using α-Ketoketene S,S-Acetals

H. Ila, H. Junjappa, S. Apparao, 1981 .

A novel and convenient synthesis of 2-amino-4-(N-alkyl-N-arylamino)-pyrimidines using polarized ketene S,S- and S,N-acetals

H. Ila, H. Junjappa, V. Aggarwal, 1980 .

Keten SS-acetals. Part 10. Reaction of α-oxoketen SS-acetals with N-alkylcyanoacetamides: a new general method for substituted and fused 2,7-dialkyl-8-amino-5-cyano-2,7-naphthyridine-1,6(2H,7H)-diones

H. Ila, H. Junjappa, A. Kumar, 1978 .

Keten dithioacetals. Part 11. Reaction of 3-cyano-4-methylthio-2(1H)-pyridones with hydrazine and guanidine: synthesis of novel substituted and fused pyrazolo[4,3-c]pyridone and pyrido[4,3-d]pyrimidine derivatives

H. Ila, H. Junjappa, A. Kumar, 1978 .

Keten SS-acetals. Part 9. Reaction of α-oxo- and α-cyano-keten SS-acetals with cyanoacetamide: a new general method for substituted and fused 4-alkylthio-3-cyano-2(1H)-pyridones and formation of novel pyridones through base-induced rearrangements

H. Ila, H. Junjappa, A. Kumar, 1978 .

A New General Method for the Synthesis of 1,3-Disubstituted 5-Cyano-4-methylthio-6-oxo-1,6-dihydropyrano[2,3-c]pyrazoles Using α-KetoketeneS,S-Acetals1

H. Ila, H. Junjappa, A. Kumar, 1976 .

Reaction of keten dithio-acetals with aziridine. Iodide ion-catalysed rearrangement of thio-aziridino-methylene compounds to novel Δ1-2-methylthio-3,3-disubstituted pyrrolines

H. Ila, H. Junjappa, A. Kumar, 1976 .

General method for the synthesis of 2-methylthio-3-substituted pyrroles using keten dithioacetals

H. Ila, H. Junjappa, A. Kumar, 1976 .

Ketene-S,S,-acetals—VI : Synthesis of 3,3-bis-(methylthio)-2-propene-2-alkyl-1-aryl-1-ones and their reaction with guanidine: A novel route for pyrimidine synthesis

S. Chauhan, H. Junjappa, 1976 .

Ketene-S,S-acetals-V : The reactions of α-keto and α-cyanoketene-S,S-acetals with guanidine and thiourea: a new general synthesis of alkoxy-pyrimidines☆☆☆

S. Chauhan, H. Junjappa, 1976 .

A novel method for the synthesis of substituted and fused 3-cyano-4-methylmercapto-2(1H)-pyridones using α-oxoketen S,S-diacetals

H. Ila, H. Junjappa, R. R. Rastogi, 1975 .

A Novel One Step Synthesis of 5(3)-Methylthio-, Alkoxy-, Amino- and Hydroxypyrazoles using α-Ketoketene-S,S-Diacetals

H. Junjappa, S. Chauhan, 1975 .

Cyclocondensation of α-oxoketene dithioacetals with β-lithioamino-β- substituted acrylonitriles:synthesis of 2,6-substituted and 5,6-annelated 3-cyano-4- (methylthio) pyridines

H. Ila, H. Junjappa, A. K. Gupta, 1990 .

Cycloaromatization of α-oxoketene dithioacetals and β-oxodithioacetals with benzyl-,1-(naphthylmethyl) and 2-(naphthylmethyl)magnesium halides: Synthesis of condensed polynuclear aromatic hydrocarbons

H. Ila, H. Junjappa, C. Rao, 1991 .

Highly regioselective synthesis of 1-aryl-3 (or 5)-alkyl/aryl-5 (or 3)-(N-cycloamino)pyrazoles.

A. Yadav, S. Peruncheralathan, H. Ila, 2005, The Journal of organic chemistry.

Reaction of alpha-oxoketene-N,S-arylaminoacetals with Vilsmeier reagents: an efficient route to highly functionalized quinolines and their benzo/hetero-fused analogues.

H. Ila, H. Junjappa, P. K. Mahata, 2003, The Journal of organic chemistry.

A new route to spiropyrrolidinyl-oxindole alkaloids via iodide ion induced rearrangement of [(N-aziridinomethylthio)methylene]-2-oxindoles.

H. Ila, H. Junjappa, U. K. Syam Kumar, 2001, Organic letters.

Ring annulation with tetrahydroisoquinoline-derived enaminones: highly convergent routes to functionalized pyrrolo[2,1-a]- and indolo[2,1-a]isoquinolines.

S. Chakrabarti, O. Barun, H. Ila, 2001, The Journal of organic chemistry.

Cuprous bromide-promoted cyclization of ketene N,S-acetals with prop-2-ynyl bromide: synthesis of regiospecifically substituted and annelated 3-acyl(or nitro)-5-methyl pyrroles

H. Ila, H. Junjappa, A.K. Gupta, 1995 .

An expedient route to 2,3-substituted and fused benzo[a]quinolizine-4-thione framework via ring annulation with beta-oxodithioesters.

H. Ila, S. Nandi, H. Junjappa, 2001, Organic letters.

Cyclocondensation of oxoketene dithioacetals with 3-aminopyrazoles: a facile highly regioselective general route to substituted and fused pyrazolo [a̲]pyrimidines

Abraham Thomas, H. Ila, H. Junjappa, 1990 .

Direct Synthesis of 2-(Cycloalkylamino)-3,4-Substituted Thiophenes via Selective Deprotonation-Cyclization of Aroyl Ketene N,S-Acetals

M. V. Rao, H. Ila, H. Junjappa, 1996 .

Regio- and chemoselective conjugate 1,4-reduction of α-oxoketene dithioacetals with sodium borohydride and sodium cyanoborohydride

H. Ila, R. Chakrasali, H. Junjappa, 1990 .

Synthesis and evaluation of pyrazolo[3,4-b]pyridines and its structural analogues as TNF-alpha and IL-6 inhibitors.

S. Bharate, R. Vishwakarma, S. Balachandran, 2008, Bioorganic & medicinal chemistry.

Structure and thermal isomerization of the adducts formed in the reaction of cyclohexyl isocyanide with dimethyl acetylenedicarboxylate

D. Ramaiah, N. Rath, M. V. George, 1998 .

Highly Regioselective One-Pot, Three-Component Synthesis of 1-Aryl-3,4-Substituted/Annulated-5-(Cycloamino)/(Alkylamino)pyrazoles from β-Oxodithioesters

G. Nandi, M. Singh, H. Ila, 2012 .

Cyanotrimethylammonium Methylid, Formation and Reaction with α,β-Unsaturated Carbonyl Compounds: Novel Cyclopropanation with an Ammonium Ylid

H. Ila, H. Junjappa, S. Bhattacharjee, 1982 .

A highly stereoselective synthesis of substituted butadienes and conjugated polyenes

B. Patro, H. Ila, H. Junjappa, 1992 .

Efficient routes to pyrazolo[3,4-b]indoles and pyrazolo[1,5-a]benzimidazoles via palladium- and copper-catalyzed intramolecular C-C and C-N bond formation.

H. Ila, H. Junjappa, Sarvesh Kumar, 2009, The Journal of organic chemistry.

Novel Route to 2,3-Substituted Benzo[b]thiophenes via Intramolecular Radical Cyclization.

A. Yadav, H. Ila, P. Singh, 2009, The Journal of organic chemistry.

Domino carbocationic rearrangement of alpha-[bis(methylthio)methylene]alkyl-2-(3/2-indolyl) cyclopropyl ketones.

A. Yadav, S. Peruncheralathan, H. Ila, 2007, The Journal of organic chemistry.

A concise formal synthesis of alkaloid cryptotackiene and substituted 6H-indolo[2,3-b]quinolines.

H. Ila, H. Junjappa, C. Venkatesh, 2004, The Journal of organic chemistry.

An efficient highly regioselective synthesis of 2,3,4-trisubstituted pyrroles by cycloaddition of polarized ketene S,S- and N,S-acetals with activated methylene isocyanides.

N. Misra, K. Panda, H. Ila, 2007, The Journal of organic chemistry.

Palladium-catalyzed intramolecular N-arylation of heteroarenes: a novel and efficient route to benzimidazo[1,2-a]quinolines.

H. Ila, H. Junjappa, C. Venkatesh, 2006, The Journal of organic chemistry.

Heteroannulation of nitroketene N,S-arylaminoacetals with POCl3: a novel highly regioselective synthesis of unsymmetrical 2,3-substituted quinoxalines.

H. Ila, H. Junjappa, P. K. Mahata, 2005, Organic letters.

Regioselective synthesis of 1-aryl-3,4-substituted/annulated-5-(methylthio)pyrazoles and 1-aryl-3-(methylthio)-4,5-substituted/annulated pyrazoles.

S. Peruncheralathan, H. Ila, T. A. Khan, 2005, The Journal of organic chemistry.

Regioselective synthesis of 1-aryl-3,4-substituted/annulated-5-(methylthio)pyrazoles and 1-aryl-3-(methylthio)-4,5-substituted/annulated pyrazoles.

S. Peruncheralathan, H. Ila, T. A. Khan, 2005, The Journal of organic chemistry.

Molecular diversity through novel organosulfur synthons: versatile templates for heterocycle synthesis.

H. Ila, H. Junjappa, 2013, Chimia.

Reaction of β-Oxodithioesters With Propargylamine: A Facile Entry to Novel 2-(Acylalkylidene)-5-(Methylene)Thiazolidines

O. Singh, M. Chandrasekharam, H. Ila, 1998 .

A Novel Radical Cyclization Approach to Thieno‐Fused Heterocycles

A. Yadav, H. Ila, P. Singh, 2011 .

A facile access to 2-methylthio/alkoxy/amino-3-acylimidazo[1, 2-a]pyridines based on cupric chloride promoted oxidative ring closure of alpha-oxoketene N,S-, N,O-, and N,N-acetals.

O. Singh, O. Barun, H. Ila, 2000, The Journal of organic chemistry.

Reformatsky Reaction on Thiocarbonyl Compounds : New C-C Bond Forming Reaction

L. Bhat, M. Chandrasekharam, H. Ila, 1993 .

Domino carbocationic rearrangement of aryl-2-(1-N-methyl/benzyl-3-indolyl)cyclopropyl ketones: a serendipitous route to 1H-cyclopenta[c]carbazole framework.

H. Ila, S. Mathur, H. Junjappa, 2002, The Journal of organic chemistry.

Trimethylsilyl chloride assisted conjugate addition-elimination of organocopper reagents to 2-bis(methylthio)nitroethylene: An efficient and highly stereoselective synthesis of 2-methylthio-2-alkyl/aryl-1-nitroethylenes and their application for synthesis of nitroheterocycles

H. Ila, B. K. Mehta, H. Junjappa, 1998 .

Anionic [4 + 2] cycloaddition reactions of dihydropyrazolin-5-one dienolate with dienophiles: a novel approach for substituted and fused indazolones

A. Roy, H. Ila, H. Junjappa, 1999 .

Anionic [4+2] cycloaddition reactions of indole-2,3-dienolate with dienophiles: A facile regiospecific route to substituted carbazoles

M. V. Rao, H. Ila, H. Junjappa, 1995 .

Heteroannulation of 3-bis(methylthio)acrolein with aromatic amines - a convenient highly regioselective synthesis of 2-(methylthio)quinolines and their benzo/hetero fused analogs - a modified skraup quinoline synthesis

I. R. Siddiqui, K. Panda, H. Ila, 2004 .

Synthesis of D-Ring Functionalized and D-Benzo/Hetero-Annulated Estrone Derivatives via α-Oxoketene Dithioacetal.

B. Patro, H. Ila, A. Gupta, 1995 .

1-(Methyldithiocarbonyl)imidazole: a Useful Thiocarbonyl Transfer Reagent for Synthesis of Substituted Thioureas

S. Samal, H. Ila, H. Junjappa, 2000 .

Chloroallyl anion : Highly regio- and diastereoselective α-addition of chloroallyl zinc reagent to carbonyl compounds

H. Ila, H. Junjappa, J. Satyanarayana, 1993 .

Dipolar cycloaddition of ethyl isocyanoacetate to 3-chloro-2-(methylthio)/2-(methylsulfonyl)quinoxalines: highly regio- and chemoselective synthesis of substituted imidazo[1,5-a]quinoxaline-3-carboxylates.

H. Ila, H. Junjappa, C. Venkatesh, 2007, The Journal of organic chemistry.

Facile one pot thermal dehydration and dethioacetalization of β-hydroxydithioacetals with dimethyl sulphoxide : synthesis of α,β-unsaturated aldehydes

M. Chandrasekharam, B. Patro, H. Ila, 1994 .

Palladium-Catalyzed Intramolecular N-Arylation of Heteroarenes: A Novel and Efficient Route to Benzimidazo[1,2-a]quinolines

H. Ila, H. Junjappa, C. Venkatesh, 2006 .

Cycloaromatization ofα-oxoketene dithioacetals with lithioacetonitrile and lithiopropionitrile: a facile route to substituted and annelated pyridines

H. Ila, H. Junjappa, Arun K. upta, 1990 .

Highly Diastereoselective [3+2] Cyclopenta[b]annulation of Indoles with2‐Arylcyclopropyl Ketones and Diesters

H. Ila, P. Singh, H. Junjappa, 2006 .

Deprotection of thioacetals and 1,3-dithianes with dimethylsulphoxide

M. Chandrasekharam, H. Ila, H. Junjappa, 1992 .

Synthesis and Lewis acid assisted rearrangement of novel donor-acceptor substituted cyclopropanes: Highly stereoselective [4+1] annulation approach to substituted and spiro cyclopentene derivatives

M. V. Rao, H. Ila, H. Junjappa, 1996 .

A Highly Stereoselective Synthesis of Substituted Butadienes and Conjugated Polyenes.

B. Patro, H. Ila, H. Junjappa, 1992 .

Aromatic and heteroaromatic annelation studies on 3-[bis(methylthio)methylene]-1-methyloxindole: synthesis of carbazoles and an efficient route to pyrido[2,3-b]indoles

H. Ila, H. Junjappa, J. Suresh, 2001 .

Rearrangement studies on acylketene O-prop-2-ynyl S-methylmonothioketals

L. Bhat, H. Ila, H. Junjappa, 1994 .

Darzen's reaction on oxoketene dithioacetals: a new versatile synthesis of substituted and annelated furan-2-carboxylates

A. Datta, H. Ila, H. Junjappa, 1989 .

One-Step Synthesis of Methyl Arylacetates from Acetophenones Using Lead(IV) Acetate

B. Myrboh, H. Ila, H. Junjappa, 1981 .

Domino carbocationic rearrangements of α-[bis(methylthio)methylene]alkyl-2-(heteroaryl)cyclopropyl ketones

S. Peruncheralathan, H. Ila, H. Junjappa, 2004 .

Synthesis of novel β-aryl-β-(methylthio)acroleins via Vilsmeier–Haack protocol as potential 1,3-dielectrophilic three-carbon building blocks

H. Junjappa, M. P. Sadashiva, S. Thomas, 2014 .

Heteroaromatic annulation of 2-methyl/2-cyanomethylbenzimidazole dianions with alpha-oxoketene dithioacetals: a highly regioselective synthetic protocol for 1,2- and 2,3-substituted/annulated pyrido[1,2-a]benzimidazoles.

K. Panda, H. Ila, H. Junjappa, 2003, The Journal of organic chemistry.

Attempted Simmons-Smith reaction on α-oxoketene dithioacetals: A new general route to 3,4-substituted and annelated thiophenes

Abraham Thomas, G. Singh, H. Ila, 1989 .

An Efficient Highly Regioselective Synthesis of 2,3,4‐Trisubstituted Pyrroles by Cycloaddition of Polarized Ketene S,S‐ and N,S‐Acetals with Activated Methylene Isocyanides.

N. Misra, K. Panda, H. Ila, 2007 .

Rearrangement studies on 3,3-bis(methylthio)-1-(arylcyclopropyl) -2-propen-1-ols: Synthesis of functionalized cyclopentenes and polyene esters

B. Patro, H. Ila, H. Junjappa, 1994 .

Heteroaromatic annulation studies on 2-[bis(methylthio)methylene]-1-methyl-3-oxoindole: synthesis of novel heterocyclo[b] fused indoles

A. Yadav, H. Junjappa, C. Venkatesh, 2004 .

Lewis acid-induced rearrangment of α-[bis(methylthio)methylene]ethyl-2-styrylcyclopropylcarbinols: unexpected formation of a novel bicyclo[3.2.1]octadiene framework

P. K. Bharadwaj, H. Ila, H. Junjappa, 2000 .

Rearrangement Studies on 3,3-Bis(methylthio)-1-(arylcyclopropyl)-2- propen-1-ols: Synthesis of Functionalized Cyclopentenes and Polyene Esters.

B. Patro, H. Ila, H. Junjappa, 1994 .

Acid-Induced Ring Opening of α-(Bis(methylthio)methylene)alkyl Cyclopropyl Ketones: A Novel Route to Substituted Cyclopentanones Through Carbocationic Cyclizations.

B. Patro, H. Ila, H. Junjappa, 1992 .

Lewis Acid Induced Rearrangement of α‐[Bis(methylthio)methylene]ethyl‐2‐styrylcyclopropylcarbinols: Unexpected Formation of a Novel Bicyclo[3.2.1]octadiene Framework.

P. K. Bharadwaj, H. Ila, H. Junjappa, 2000 .

Synthesis of Novel β-Aryl-β-(methylthio)acroleins via Vilsmeier—Haack Protocol as Potential 1,3-Dielectrophilic Three-Carbon Building Blocks.

H. Junjappa, M. P. Sadashiva, S. Thomas, 2015 .

Synthesis of a dl-polymer and an active (+) polymer containing the 2,4,5,7-tetranitrofluorenylidenaminooxysuccinic moiety. Chromatographic studies

M. Newman, H. Junjappa, 1971 .

HIGHLY EFFICIENT AND SELECTIVE DISPLACEMENT OF ALKYLTHIO GROUP ON ACYLKETENE O,S-ACETALS BY ORGANOCOPPER REAGENTS : A NOVEL ROUTE TO 2-ALKOXY/ARYLOXY- 1-ALKENYLKETONES

H. Ila, B. K. Mehta, H. Junjappa, 1995 .

Highly Efficient and Selective Displacement of Alkylthio Group on Acylketene O,S-Acetals by Organocopper Reagents: A Novel Route to 2- Alkoxy/Aryloxy-1-alkenylketones.

H. Ila, B. K. Mehta, H. Junjappa, 1996 .

Cyclocondensation of 2-lithiomethylthiazoles and 2-lithiomethylthiazoline with α-oxoketene dithioacetals: synthesis of substituted and annelated thiazolo- and dihydrothiazolo[3,2-a]pyridinium compounds

Abraham Thomas, H. Ila, H. Junjappa, 1990 .

Cyclocondensation of 2-Lithiomethylthiazoles and 2-Lithiomethylthiazoline with α-Oxoketene Dithioacetals: Synthesis of Substituted and Anellated Thiazolo- and Dihydrothiazolo(3,2-a)pyridinium Compounds.

Abraham Thomas, H. Ila, H. Junjappa, 1990 .

Synthesis of D-Ring Functionalized and D-Benzo/Hetero-Annulated Estrone Derivatives via α-Oxoketene Dithioacetal

B. Patro, H. Ila, H. Junjappa, 1995 .

A Novel Synthesis of 2-Phenylindoles: Reactions of Aromatic Amines with Phenacyldimethylsulphonium Bromide and Phenacylidinedimethylsulphurane

H. Junjappa, 1975 .

Polarized Ketene Dithioacetals. Part 53. A Facile Synthesis of 2-Aryl- 6-methylthio-4H-pyran-4-ones and a Novel Cycloaromatization Reaction.

H. Ila, H. Junjappa, L. Singh, 1988 .