R. M. Singh

发表

Facile synthesis of functionalized 1H-pyrrolo[2,3-b]quinolines via Ugi four-component reaction followed by Cu-catalyzed aryl-amide, C–N bond coupling

M. Asthana, Ritush Kumar, T. Gupta, 2015 .

Densely functionalized 1,2-dihydrobenzo[b][1,6]naphthyridines: one-pot synthesis via sequential Ugi and Heck reactions

M. Asthana, R. M. Singh, N. Sharma, 2014 .

TBHP Promoted Cross‐Dehydrogenative coupling (CDC) Reaction: Metal/Additive‐Free Synthesis of Chromone‐Fused Quinolines

T. Gupta, R. M. Singh, Jay Singh, 2017 .

Metal free TBHP-promoted intramolecular carbonylation of arenes via radical cross-dehydrogenative coupling: synthesis of indenoquinolinones, 4-azafluorenones and fluorenones.

A. Pandey, R. M. Singh, Jay Singh, 2016, Organic & biomolecular chemistry.

Cascade SN2′–SNAr, Elimination, and 1,5‐Hydride Shift Reactions by Acetylacetone/Acetoacetic Esters: Synthesis of 9,10‐Dihydroacridines

T. Gupta, R. M. Singh, K. Bharadwaj, 2016 .

Ligand promoted and controlled palladium-catalyzed intramolecular Heck reaction of homoallyl alcohols: a facile synthesis of cyclopentaannulated quinolines

Bhawana Singh, Ritush Kumar, R. M. Singh, 2012 .

Catalytic trifluoromethylation of aldehyde and potential application for pyrano[4,3-b]quionline synthesis

R. M. Singh, Kalpana Mishra, K. C. Bharadwaj, 2018, Tetrahedron Letters.

TBAB-catalyzed cascade reactions: facile synthesis of 1-trifluoromethyl-3-alkylidene-1,3-dihydrofuro[3,4-b]quinolines via 5-exo-dig cyclization of o-arylalkynylquinoline aldehydes

T. Gupta, R. M. Singh, Jay Singh, 2017 .

Copper-free Sonogashira coupling of 2-chloroquinolines with phenyl acetylene and quick annulation to benzo[b][1,6]naphthyridine derivatives in aqueous ammonia

S. Upadhyay, Bhawana Singh, R. M. Singh, 2008 .

rac-BINAP-PdCl2 catalyzed Heck reactions of 3-formylquinolin-2-yl chlorides with methyl acrylate: synthesis of methyl 3-(3-formylquinolin-2-yl) acrylates

M. Asthana, Ritush Kumar, R. M. Singh, 2014 .

Metal-free POCl3 promoted stereoselective hydrochlorination of ethynylated azaheterocycles.

Ritush Kumar, R. M. Singh, 2019, Organic & biomolecular chemistry.

Base promoted facile route to functionalized benzo[b][1,8]naphthyridin-2-(1H)-ones from N-benzyl-N-(3-cyanoquinolin-2-yl)acetamides

R. Singh, M. Asthana, T. Gupta, 2014 .

Pd-Catalyzed One-Pot Stepwise Synthesis of Benzo[b][1,6]naphthyridines from 2-Chloroquinoline-3-carbonitriles Using Sulfur and Amines As Nucleophiles.

M. Asthana, Ritush Kumar, R. M. Singh, 2017, The Journal of organic chemistry.

An alternative synthesis of pyrimido[4,5- b ]quinoline-4-ones via metal-free amination in water and Vilsmeier–Haack cyclization

S. Upadhyay, M. Asthana, Ritush Kumar, 2012 .

Palladium-catalyzed one-pot synthesis of benzo[ b ][1,6]naphthyridines via Sonogashira coupling and annulation reactions from 2-chloroquinoline-3-carbonitriles

M. Asthana, Ritush Kumar, R. M. Singh, 2013 .

Na2S·9H2O mediated facile synthesis of 1,3-dihydrofuro[3,4-b]quinoline derivatives via domino reduction approach

A. Tewari, T. Gupta, R. M. Singh, 2021, Tetrahedron.

Pd catalyzed facile synthesis of cyclopenta[b]quinolin-1-one via sequential Sonogashira coupling and annulation. An unusual mode of ring closure, using sulphur as a soft nucleophile

Ritush Kumar, T. Gupta, R. M. Singh, 2016 .

Copper-free palladium-catalyzed Sonogashira coupling-annulation: efficient one-pot synthesis of functionalized pyrano[4,3-b]quinolines from 2-chloro-3-formylquinolines.

R. Khanna, Bhawana Singh, R. M. Singh, 2009, The Journal of organic chemistry.

Palladium-Catalyzed Reaction of MBH Acetates and Terminal Alkynes: Cascade Synthesis of Phenanthridine and 6-Arylethynylphenanthridine

T. Gupta, R. M. Singh, Rashmi Singh, 2018, European Journal of Organic Chemistry.

FeCl3·6H2O-catalyzed facile and efficient synthesis of pyrano[4,3-b]quinolines and isochromenes

M. Asthana, R. M. Singh, Jay Singh, 2016 .

Vilsmeier—Haack Reagent: A Facile Synthesis of 2‐Chloro‐3‐formylquinolines from N‐Arylacetamides and Transformation into Different Functionalities.

R. M. Singh, Ambika Srivastava, 2005 .

Electrophile-induced domino cyclization reaction for the synthesis of 2,2a,10,11-tetrahydrofuro[2′,4′:4,6]pyrano[2,3- b ]quinolines

S. Upadhyay, Bhawana Singh, M. C. Puerta, 2008 .

An economical nucleophilic route toward facile synthesis of pyrano[4,3-b]quinolin-1-ones via 6-endo-dig cyclization of o-alkynylquinoline esters

M. Asthana, R. M. Singh, N. Sharma, 2013 .

TBHP-promoted oxidative cyclization of o-alkynylquinoline aldehydes: Metal/additive-free domino synthesis of pyrano[4,3-b]quinolin-1-ones

T. Gupta, R. M. Singh, Jay Singh, 2018 .

Base-free NIS promoted electrophilic cyclization of alkynes: an efficient synthesis of iodo substituted pyrano[4,3-b]quinolines

Seema Singh, Bhawana Singh, R. M. Singh, 2011 .

Copper-catalyzed cascade reaction: synthesis of pyrimido[4,5-b]quinolinones from 2-chloroquinoline-3-carbonitriles with (aryl)methanamines

T. Gupta, R. M. Singh, Jay Singh, 2018 .

Morita–Baylis–Hillman reaction of acrylamide with isatin derivatives

R. M. Singh, D. Tiwari, K. C. Bharadwaj, 2014, Beilstein journal of organic chemistry.

Na2S-mediated synthesis of terminal alkynes from gem-dibromoalkenes.

R. Singh, T. Gupta, R. M. Singh, 2017, Organic & biomolecular chemistry.

Temperature dependent selective synthesis of linear 2-bromo and 2-alkoxyfuro[2,3-b]quinolines: reaction of 3-(2,2-dibromovinyl-)quinolin-2(1H)-ones with alcoholic KOH

R. Singh, M. Asthana, R. M. Singh, 2014 .

Active methylene compounds (AMCs) controlled facile synthesis of acridine and phenanthridine from morita Baylis–Hillman acetate

T. Gupta, R. M. Singh, Jay Singh, 2017 .

An alternate route to the synthesis of imidazo[1,2‐a]quinolines using I2‐NaI reagent

Seema Singh, S. Upadhyay, R. M. Singh, 2011 .

Rapid, clean and efficient one-pot synthesis of thiopyrano[2,3-b]quinolines via domino Michael addition/cyclization reactions

Bhawana Singh, M. Asthana, R. M. Singh, 2012 .

Facile Metal‐Free Synthesis of Phenanthridines by SN2′ Reaction/C–H Functionalization/Aromatization through the Reaction of Morita–Baylis–Hillman Acetates with Nitroalkanes

B. Maiti, T. Gupta, R. M. Singh, 2018 .

Base-free amination of BH acetates of 2-chloroquinolinyl-3-carboxaldehydes: a facile route to the synthesis of N-substituted-1,2-dihydrobenzo[b][1,8]-naphthyridines

Bhawana Singh, R. M. Singh, A. Chandra, 2011 .

Ligand-free palladium-catalyzed facile construction of tetra cyclic dibenzo[b,h][1,6]naphthyridine derivatives: domino sequence of intramolecular C–H bond arylation and oxidation reactions

T. Gupta, R. M. Singh, Jay Singh, 2016 .

Synthesis of diastereomeric 2,4-disubstituted pyrano[2,3-b]quinolines from 3-formyl-2-quinolones through O–C bond formation via intramolecular electrophilic cyclization

Bhawana Singh, R. M. Singh, A. Chandra, 2007 .

Base-catalyzed cyclization reaction of 2-chloroquinoline-3-carbonitriles and guanidine hydrochloride: a rapid synthesis of 2-amino-3H-pyrimido[4,5-b]quinolin-4-ones

S. Upadhyay, Bhawana Singh, R. M. Singh, 2011 .

Ag(I)-Catalyzed one-pot synthesis of 4-fluorobenzo[b][1,6] naphthyridines and 4-fluoroisoquinolines via iminofluorination of alkynes with Selectfluor

T. Gupta, R. M. Singh, Jay Singh, 2017 .

Alkaloid group of Cinchona officinalis: structural, synthetic, and medicinal aspects

T. Gupta, R. M. Singh, K. C. Bharadwaj, 2018 .

Molecular Semiconductors Based on Charge Transfer Complexes of Some Substituted Phenothiazines with Tetracyanoethylene

R. Singh, R. M. Singh, S. Verma, 1993 .

Nuclear magnetic resonance studies on conformations about the nitrogen-carbon bond in some N-malonylimides and some comments on the origin of nitrogen-nitrogen bond torsional barriers

R. M. Singh, S. Verma, 1975 .

Transformation of N-Acylaminoacetanilides and N-Benzoylglycine Hydrazides into 4-(N,N-Dimethylaminomethylene)-2-aryl-2-oxazolin-5- ones Using Vilsmeier-Haack reagent and Their Reactions with Nucleophiles.

Kulbir Singh, R. M. Singh, M. Singh, 1995 .

Base‐Free Amination of BH Acetates of 2‐Chloroquinolinyl‐3‐carboxaldehydes. A Facile Route to the Synthesis of N‐Substituted‐1,2‐dihydrobenzo[b][1,8]naphthyridines.

Bhawana Singh, R. M. Singh, A. Chandra, 2011 .

Pd-Catalyzed One-Pot Stepwise Synthesis of Benzo[b][1,6]naphthyridines from 2-Chloroquinoline-3-carbonitriles Using Sulfur and Amines As Nucleophiles.

M. Asthana, Ritush Kumar, R. M. Singh, 2017, The Journal of organic chemistry.