Vishwakarma Singh

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Aromatics to triquinanes. Synthesis of 1, 4, 4,11-tetramethyltricyclo[6.3.0.02,6]undeca-3, 7, 10-trione: A potential precursor for coriolin and congeners

P. Vedantham, Vishwakarma Singh, B. Thomas, 1998 .

Rearrangement in endo annulated bicyclo[2.2.2]octenone framework: A new route to functionalized tricyclo[5.3.1.02,6] ring system and cis:syn:cis tricyclopentanoids

Vishwakarma Singh, B. Jagadish, 1996 .

Photodecarbonylation: A novel photoreaction of rigid β,γ-enones

Vishwakarma Singh, B. Thomas, U. Sharma, 1995 .

A tandem oxidative dearomatization/intramolecular Diels–Alder reaction: a short and efficient entry into tricyclic system of maoecrystal V

S. Mobin, Vishwakarma Singh, Pravin Bhalerao, 2010 .

Novel entry into oxepane–diquinane and oxepane–sterpurane hybrids: synthesis and photochemistry of 3-oxatricyclo[7.2.2.01,7]tridecenones

K. Polborn, P. Vedantham, Vishwakarma Singh, 2003 .

Studies on cycloaddition of spiroepoxycyclohexa-2,4-dienones with indene and sigmatropic shifts in excited states: Synthesis of benzotricyclo[5.2.2.02,6]undec-10-en-9-ones, annulated polyquinanes and bicyclo[4.2.0]octanoids

S. Tripathi, Vishwakarma Singh, 2018, Tetrahedron.

Simple, Efficient, and Stereoselective Synthesis of Functionalized Spiro[4.5]decane and Spiro[5.5]undecane Systems

S. Mobin, Vishwakarma Singh, R. Singh, 2008 .

Oxidative dearomatization and retro-Diels-Alder/Diels-Alder cascade: Synthesis and photoreactions of azepane annulated bicyclo[2.2.2]octenone

S. Tripathi, Vishwakarma Singh, 2019, Tetrahedron Letters.

Cycloaddition of Spiroepoxycyclohexa-2,4-dienones, Radical Cyclization and 1,3-Acyl Shift in Excited State: Aromatics to Sterpuren-4-one.

Raghaba Sahu, Vishwakarma Singh, 2017, The Journal of organic chemistry.

π(4)s + π(2)s Cycloaddition of Spiroepoxycyclohexa-2,4-dienone, Radical Cyclization, and Oxidation-Aldol-Oxidation Cascade: Synthesis of BCDE Ring of Atropurpuran.

Vishwakarma Singh, Dnyandev B. Jarhad, 2016, The Journal of organic chemistry.

Benzofuran as a dienophile in π4s+π2s cycloaddition with cyclohexa-2,4-dienones. Studies on synthesis and photoreaction of dihydrobenzofuran annulated bicyclo[2.2.2]octenones

Tarun Kumar Behera, Vishwakarma Singh, Dnyandev B. Jarhad, 2015 .

Oxidative dearomatization and unusual intramolecular Diels–Alder reaction of cyclohexa-2,4-dienone: synthesis and photoreaction of oxa-tricyclo[5.2.2.01,5]undec-10-ene-8-ones

Vishwakarma Singh, B. Das, 2015 .

Studies on synthesis of spirolactone annulated bicyclo[2.2.2]octanes: tricyclic core of yaoshanenolides

S. Mobin, Vishwakarma Singh, B. Das, 2014 .

Spiroepoxycyclohexa-2,4-dienones in Organic Synthesis

Vishwakarma Singh, 1999 .

Studies Toward Synthesis of Tetracyclic Core of Daphmanidin A–Type Alkaloids

Vishwakarma Singh, B. Das, 2015 .

Molecular complexity from aromatics. Studies on synthesis of polycyclic system related to crotogoudin

Tarun Kumar Behera, Vishwakarma Singh, 2014 .

Molecular diversity from aromatics. A tandem oxidative dearomatization, cycloaddition and reactivity modulation in excited states: synthesis of tricyclo[5.3.1.01,5]undecanes and bicyclo[4.2.0]octanes from common precursors

Jyotirling R. Mali, Vishwakarma Singh, S. H. Islam, 2013 .

Molecular complexity from aromatics. Cycloaddition of spiroepoxycyclohexa-2,4-dienones and intramolecular Diels–Alder reaction: a stereoselective entry into tetracyclic core of atisane diterpenoids

B. C. Sahu, S. Mobin, Vishwakarma Singh, 2013 .

A New Synthesis of 5-(1′,1′,1′-Trialkylmethyl) Resorcinols

Vishwakarma Singh, V. V. Kane, Arnold R. Martin, 1981 .

Synthesis and photoreactions of 3-oxa-tricyclo[5.2.2.01,5]undecenones: a novel, stereoselective route to oxa-triquinanes and oxa-sterpuranes

Vishwakarma Singh, G. Praveena, S. Alam, 2002 .

Molecular complexity from aromatics. Cycloaddition of cyclohexa-2,4-dienones, sigmatropic 1,2-acyl shift and ring-closing metathesis: a new, efficient, and stereoselective synthesis of (±)-hirsutic acid C and medium ring carbocycles

S. Mobin, D. Tosh, Vishwakarma Singh, 2007 .

Recent approaches towards synthesis of cis-decalins

Vishwakarma Singh, Shantanu Pal, S. Iyer, 2005 .

Intramolecular Diels–Alder reaction in 1-oxaspiro[2.5]octa-5,7-dien-4-one and sigmatropic shifts in excited states: novel route to sterpuranes and linear triquinanes: formal total synthesis of (±)-coriolin

Vishwakarma Singh, S. Alam, 1999 .

Recent developments in general methodologies for the synthesis of linear triquinanest

Vishwakarma Singh, B. Thomas, 1998 .

Sigmatropic 1,2- and 1,3-acyl shifts in excited states: A novel, general protocol for the synthesis of tricyclopentanoids and protoilludanes

Vishwakarma Singh, M. Porinchu, 1996 .

Synthetic organic chemistry in India

Vishwakarma Singh, A. Bisai, 2019, Proceedings of the Indian National Science Academy.

IBX, an Excellent Reagent for Oxidation of 2-Furyl Carbinols: A New and General Method for Preparation of Furyl Ketones

Vishwakarma Singh, Vikrant Singh, 2010 .

Molecular diversity from aromatics. Cycloaddition of cyclohexa-2,4-dienones, ring-closing metathesis and sigmatropic shifts: a general and stereoselective route to novel spirocarbocyclics

S. Mobin, Vishwakarma Singh, Dnyandev B. Jarhad, 2015 .

Molecular complexity from aromatics: synthesis of highly functionalized spiro δ-lactones

Vishwakarma Singh, Vikrant Singh, 2009 .

The chemistry of 1,2-carbonyl transposition

Vishwakarma Singh, V. V. Kane, Arnold R. Martin, 1983 .

Hybrid systems through natural product leads: an approach towards new molecular entities.

Vishwakarma Singh, Goverdhan Mehta, G. Mehta, 2002, Chemical Society reviews.

Molecular complexity and diversity from aromatics. Intramolecular cycloaddition of cyclohexa-2,4-dienones and sigmatropic shift in excited state: a unified approach towards synthesis of polycyclic frameworks related to crotogoudin, conidiogenol, and crinipellins

S. Mobin, Tarun Kumar Behera, Vishwakarma Singh, 2016 .

Synthesis of 4-aza tricyclo [6.2.2.01,6]dodecenone and photoreactions: a stereoselective, entry to aza-polycyclic systems related to magellanine and congeners

S. Mobin, Vishwakarma Singh, Pravin Bhalerao, 2012 .

π4s+π2s Cycloaddition between electron deficient π-systems and photoreaction of β,γ-enones: a novel stereoselective entry into angular triquinanes

Vishwakarma Singh, Sanjoy Lahiri, 2003 .

Molecular Complexity from Aromatics: Synthesis and Photoreaction of endo-Tricyclo[5.2.2.02,6]undecanes. Formal Total Syntheses of (±)-Coriolin

Vishwakarma Singh, V. V. Kane, B. Samanta, 2000 .

A novel stereoselective total synthesis of (±)-hirsutene from saligenin

P. Sahu, P. Vedantham, Vishwakarma Singh, 2002 .

A novel, stereospecific total synthesis of (±)-Δ9(12)-capnellene from p-cresol

Vishwakarma Singh, S. Prathap, M. Porinchu, 1997 .

Cycloaddition of annulated cyclohexa-2,4-dienones and novel reduction of halogen at bridgehead: an expedient route to tetracyclo[6.5.2.02,7.09,13]pentadec-2(7),11-dien-14-one and framework of conidiogenol and conidiogenone

S. Mobin, Vishwakarma Singh, R. Singh, 2009 .

Aromatics to triquinanes: p-cresol to (+/-)-Delta(9(12))-capnellene

Vishwakarma Singh, S. Prathap, M. Porinchu, 1998 .

Synthesis of embellished bicyclo[2.2.2]octenones and a sigmatropic 1,2-acyl shift in an excited state: a novel and stereoselective route to (±)-hirsutic acid C and complicatic acid

S. Mobin, D. Tosh, Vishwakarma Singh, 2004 .

Studies on synthesis and photoreaction of tricycloundecanes endowed with β,γ-enone chromophore: Towards angular triquinanes and annulated bicyclo[4.2.0]octanes

Raghaba Sahu, Vishwakarma Singh, 2017 .

1,3‐Acyl Migrations in β,γ‐Unsaturated Ketones

Vishwakarma Singh, 2004 .

GENERATION OF MOLECULAR COMPLEXITY FROM AROMATICS : A FORMAL TOTAL SYNTHESIS OF CORIOLIN FROM 6-METHYLSALIGENIN

Vishwakarma Singh, B. Samanta, 1999 .

Aromatics to Triquinanes. Synthesis and Photoreaction of Tricyclo[5.2.2.02,6]undecanes Having an α-Methoxy β,γ-Unsaturated Carbonyl Chromophore: A Novel, Efficient, and General Route to Linearly Fused Cis:Anti:Cis Tricyclopentanoids

Vishwakarma Singh, B. Thomas, 1997 .

o-vanillyl alcohol as a synthetic equivalent of 2-methoxycyclohexa-2,4-dienones : a novel synthesis of linearly fused cis:anti:cis tricyclopentanoids

Vishwakarma Singh, B. Thomas, 1992 .

Reactive species from aromatics and oxa-di-π-methane rearrangement: a stereoselective synthesis of (±)-hirsutene from salicyl alcohol

P. Sahu, P. Vedantham, Vishwakarma Singh, 2004 .

Photochemical Rearrangements in β,γ‐Unsaturated Enones: The Oxa‐di‐π‐methane Rearrangement

Vishwakarma Singh, 2004 .

Cycloaddition of substituted spiroepoxycyclohexa-2,4-dienones: synthesis and X-ray crystal structure of the adducts

D. Tosh, Vishwakarma Singh, L. Ernst, 2002 .

Intramolecular Diels—Alder Reaction in 1‐Oxaspiro[2.5]octa‐5,7‐dien‐4‐one and Sigmatropic Shifts in Excited States: Novel Route to Sterpuranes and Linear Triquinanes: Formal Total Synthesis of (.+‐.)‐Coriolin.

Vishwakarma Singh, S. Alam, 2000 .

Cycloaddition of Oxidopyrylium Species in Organic Synthesis

Vishwakarma Singh, G. Trivedi, U. M. Krishna, 2008 .

Cycloaddition between electron-deficient pi-systems, photochemical and radical-induced reactions: a novel, general, and stereoselective route to polyfunctionalized bridged bicyclo[2.2.2]octanes, bicyclo[3.3.0]octanes, bicyclo[4.2.0]octanes, and tricyclo[4.3.1.0(3,7)]decanes.

S. Mobin, Vishwakarma Singh, Shantanu Pal, 2006, The Journal of organic chemistry.

Intramolecular cycloaddition in 6,6-spiroepoxycyclohexa-2,4-dienone: simple aromatics to (+/-)-platencin.

S. Mobin, Vishwakarma Singh, V. Bansal, 2010, Organic & biomolecular chemistry.

Catalysis and regioselectivity of quinone Diels–Alder reactions

J. B. Hendrickson, Vishwakarma Singh, 1983 .

IBX, an Excellent Reagent for Oxidation of 2‐Furyl Carbinols: A New and General Method for Preparation of Furyl Ketones.

Vishwakarma Singh, Vikrant Singh, 2010 .

A Homodienolate-Enone Addition

M. Carducci, R. Bates, Vishwakarma Singh, 2000 .

REVELATION OF PENTACYCLO (6.2.1.02,7.04,10.05,9) UNDECANE \ightleftharpoons OXA-BIRD CAGE EQUILIBRIUM BY 13CMR SPECTROSCOPY: FRAGMENTATION OF CAGED POLYCYCLIC SYSTEMS WITH LEAD TETRAACETATE

H. Duddeck, G. Mehta, Vishwakarma Singh, 1980 .

Cycloaddition of cyclohexa-2,4-dienones with β-nitroacrylates: a short and efficient entry into bicyclo[2.2.2]octanes endowed with β-nitro-ester and β-amino ester functionality

S. Mobin, Tarun Kumar Behera, Vishwakarma Singh, 2014 .

Studies on alkylation of bicyclo[2.2.2]octenones and 3,3-sigmatropic shift: synthesis of advanced cis-decalins

Vishwakarma Singh, S. Iyer, 2005 .

Synthesis of tricyclo[7.2.2.02,8]tridecanes and photoreaction in the excited singlet state: A novel entry to the DCB carbon framework of phorbol

Vishwakarma Singh, B. Samanta, 1999 .

A novel synthesis of substituted bicyclo[2.2.2]octenones and 3,3-sigmatropic shift: a general and stereoselective entry into functionalized cis-decalins

Vishwakarma Singh, S. Iyer, 2001 .

Synthesis of 9‐Spiroepoxy‐endo‐tricyclo[5.2.2.02,6]undeca‐4,10‐dien‐8‐one

P. Sahu, P. Vedantham, Vishwakarma Singh, 2005 .

π4s + π2s Cycloaddition: Synthesis and OXA-DI-π-Methane Rearrangement of Annulated Bicyclo (2.2.2) Octenones

Vishwakarma Singh, B. Raju, V. Singh, 1988 .

Intramolecular Diels-Alder Reaction of Cyclohexa-2,4-dienones: Synthesis and Photochemical Reactions of Oxa-Homobrendanes

Vishwakarma Singh, S. Alam, M. Porinchu, 1995 .

Sigmatropic 1,3-acyl shift in excited state: a novel, stereoselective route to protoilludanoids

Vishwakarma Singh, M. Porinchu, 1993 .

An Efficient Synthesis of a Novel Pentacyclo [5.4.0.02,6.03,10.05,9] Undecane-8, 11-Dione-4-Spiro-1-Cyclopentane

Vishwakarma Singh, B. Raju, Pradeep Deota, 1987 .

A new hydroxy-lactonization of olefinic acids

J. B. Hendrickson, Vishwakarma Singh, J. Hendrickson, 1983 .

On the fluxional behaviour of a polycyclic (4.4.2) propella-2,4-diene

K. S. Rao, G. Mehta, Vishwakarma Singh, 1980 .

Polycyclic rearrangements. A novel, carbonium ion mediated, bicyclo (4.2.0) octa-2,4-diene→1,3,5-cyclooctatriene isomerisation in a propellane framework

G. Mehta, Vishwakarma Singh, A. Srikrishna, 1979 .

Oxidative Dearomatization: Synthesis of Functionalized Bicyclo[2.2.2]octenones, Sigmatropic Shift in Excited State, and Radical-Induced Cleavage of Cyclopropane Ring

Vishwakarma Singh, Karan Arora, 2014 .

Efficient stereoselective synthesis of novel steroid-polyquinane hybrids.

D. Stalke, Vishwakarma Singh, V. V. Kane, 2003, Organic letters.

Cycloaddition of cyclohexa-2,4-dienones, ring-closing metathesis, and photochemical reactions: a common stereoselective approach to duprezianane, polyquinane and sterpurane frameworks.

S. Mobin, K. Karki, Vishwakarma Singh, 2007, The Journal of organic chemistry.

Cycloaddition of 6-Hydroxy-2,6-dimethylcyclohexa-2,4-dienone: A Stereoselective Entry into Functionalized Bicyclo[2.2.2]octanes and a Novel 1,2-Migration of Methyl Group.

S. Mobin, Vishwakarma Singh, Girish Chandra, 2008 .

Molecular Complexity from Aromatics - AnEfficient Route to 1,8-Dimethyl-5-spirocyclopropanetricyclo[6.3.0.0²,6]undec-10-one:A Potential Intermediate for Synthesis of Ceratopicanol

S. Mobin, Vishwakarma Singh, Girish Chandra, 2008 .

Cycloaddition of cyclohexa-2,4-dienones with electron deficient 2 pi partners: a novel and stereoselective route to functionalized bicyclo[2.2.2]octenones.

S. Mobin, Vishwakarma Singh, Shantanu Pal, 2002, Chemical Communications.

Cycloaddition of Cyclohexa-2,4-dienones with Nitroolefins: An Unusual Regioselectivity and Expeditious Entry into Nitro-bicyclo[2.2.2]octenones

S. Mobin, D. Tosh, Vishwakarma Singh, 2008 .

Cycloaddition between electron deficient partners: an efficient regio- and stereoselective synthesis of functionalised bicyclo[2.2.2]octenones. A tandem alkylation, stereochemical inversion and aldol condensation

S. Mobin, Vishwakarma Singh, G. Praveena, 2004 .

Cycloaddition of Cyclohexa‐2,4‐dienones with Electron Deficient 2π Partners: A Novel and Stereoselective Route to Functionalized Bicyclo[2.2.2]octenones.

S. Mobin, Vishwakarma Singh, Shantanu Pal, 2003 .

Synthesis and photoreaction of tricyclo[5.2.2.02,6]undecanes in the excited singlet (1S) state: a novel and stereospecific route to protoilludanoids

Vishwakarma Singh, U. Sharma, 1998 .