Search Results - "Singh, Radhey M"

Copper-Free Palladium-Catalyzed Sonogashira Coupling−Annulation: Efficient One-Pot Synthesis of Functionalized Pyrano[4,3-b]quinolines from 2-Chloro-3-formylquinolines by Chandra, Atish, Singh, Bhawana, Khanna, Ranjana S, Singh, Radhey M

“…A convenient, one-pot, copper-free, Pd-catalyzed methodology has been described for the synthesis of 1,3-disubstituted pyrano[4,3−b]quinolines from…”
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Pd-Catalyzed One-Pot Stepwise Synthesis of Benzo[b][1,6]naphthyridines from 2‑Chloroquinoline-3-carbonitriles Using Sulfur and Amines As Nucleophiles by Kumar, Ritush, Asthana, Mrityunjaya, Singh, Radhey M

“…A palladium-catalyzed one-pot stepwise coupling-annulation reaction of 2-chloroqunoline-3-carbonitriles enabled the direct synthesis of sulfur-substituted…”
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Metal free TBHP-promoted intramolecular carbonylation of arenes via radical cross-dehydrogenative coupling: synthesis of indenoquinolinones, 4-azafluorenones and fluorenones by Mishra, Kalpana, Pandey, Ashok Kumar, Singh, Jay Bahadur, Singh, Radhey M

“…A metal-free, TBHP-promoted economical route is developed via the sp(2) C-H bond functionalization strategy for the synthesis of indenoquinolinones,…”
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Palladium‐Catalyzed Reaction of MBH Acetates and Terminal Alkynes: Cascade Synthesis of Phenanthridine and 6‐Arylethynylphenanthridine by Gupta, Tanu, Singh, Jay Bahadur, Singh, Rashmi, Singh, Radhey M.

“…We have described the palladium‐catalyzed regioselective cascade synthesis of phenanthridines and 6‐arylethynylphenanthridines in good to excellent yields from…”
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Facile Metal‐Free Synthesis of Phenanthridines by SN2′ Reaction/C–H Functionalization/Aromatization through the Reaction of Morita–Baylis–Hillman Acetates with Nitroalkanes by Gupta, Tanu, Singh, Jay Bahadur, Mishra, Kalpana, Maiti, Biswajit, Singh, Radhey M.

“…A simple, highly efficient, and regioselective synthesis of functionalized phenanthridines by the reaction of MBH acetates of 2‐chloroquinoline‐3‐carbaldehydes…”
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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 by Asthana, Mrityunjaya, Kumar, Ritush, Gupta, Tanu, Singh, Radhey M.

“…[Display omitted] A simple one-pot two-step reaction comprising an Ugi four-component reaction (Ugi-4CR) and copper-catalyzed intramolecular amide-aryl…”
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Cascade SN2′-SNAr, Elimination, and 1,5-Hydride Shift Reactions by Acetylacetone/Acetoacetic Esters: Synthesis of 9,10-Dihydroacridines by Gupta, Tanu, Bharadwaj, Kishor Chandra, Singh, Radhey M.

“…A reaction involving the use of acetylacetone/methyl acetoacetate and Morita–Baylis–Hillman acetates for the efficient, one‐pot, metal‐free synthesis of…”
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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 by Singh, Bhawana, Chandra, Atish, Singh, Radhey M.

“…An efficient base-free one-pot synthesis of 1,2-dihydrobenzo[ b][1,8]naphthyridines from BH acetates of 2-chloro-3-formylquinolines and activated alkenes…”
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Active methylene compounds (AMCs) controlled facile synthesis of acridine and phenanthridine from morita Baylis–Hillman acetate by Gupta, Tanu, Singh, Jay Bahadur, Mishra, Kalpana, Singh, Radhey M.

“…We carried out simple and facile syntheses of acridines and phenanthridines from MBH acetates of 2-chloro-quinoline-3-carbaldehydes with active methylene…”
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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 by Nandini, Durgesh, Asthana, Mrityunjaya, Mishra, Kalpana, Singh, R.P., Singh, Radhey M.

“…[Display omitted] Base promoted and temperature dependent reactions of 3-(2,2-dibromovinyl)quinolin-2(1H)-ones have been described. At 50°C, the cyclization…”
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Rapid, clean and efficient one-pot synthesis of thiopyrano[2,3-b]quinolines via domino Michael addition/cyclization reactions by Singh, Bhawana, Chandra, Atish, Asthana, Mrityunjaya, Singh, Radhey M.

“…Rapid and efficient one-pot synthesis of thiopyrano[2,3-b]quinolines is described from the reaction of 3-formyl-quinoline-2-thiones with acrylonitrile using…”
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An alternative synthesis of pyrimido[4,5-b]quinoline-4-ones via metal-free amination in water and Vilsmeier–Haack cyclization by Singh, Radhey M., Sharma, Neha, Kumar, Ritush, Asthana, Mrityunjaya, Upadhyay, Shraddha

“…Two-step synthesis of pyrimido[4,5-b]quinoline-4-ones is described from 2-chloroquinoline-3-carbonitries via amination and cyclization reactions, respectively…”
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Base promoted facile route to functionalized benzo[b][1,8]naphthyridin-2-(1H)-ones from N-benzyl-N-(3-cyanoquinolin-2-yl)acetamides by Nandini, Durgesh, Asthana, Mrityunjaya, Gupta, Tanu, Singh, R.P., Singh, Radhey M.

“…A facile synthesis of 4-amino-N-benzylbenzo[b][1,8]naphthyridin-2(1H)-ones 3 is described from N-benzyl-N-(3-cyanoquinolin-2-yl)acetamides 2 with t-BuOK in…”
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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 by CHANDRA, Atish, UPADHYAY, Shraddha, SINGH, Bhawana, SHARMA, Neha, SINGH, Radhey M

“…t-BuOK-catalyzed cyclization of 2-chloroquinoline-3-carbonitriles with guanidine hydrochloride provided simple and rapid synthesis of…”
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Base-free NIS promoted electrophilic cyclization of alkynes: an efficient synthesis of iodo substituted pyrano[4,3- b]quinolines by Singh, Bhawana, Chandra, Atish, Singh, Seema, Singh, Radhey M.

“…A simple and mild procedure for the synthesis of iodo substituted 1 H-pyrano[4,3- b]quinolines has been achieved using NIS reagent in the absence of base from…”
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Ligand promoted and controlled palladium-catalyzed intramolecular Heck reaction of homoallyl alcohols: a facile synthesis of cyclopentaannulated quinolines by Singh, Radhey M., Chandra, Atish, Sharma, Neha, Singh, Bhawana, Kumar, Ritush

“…Bidentate phosphine ligands in palladium-catalyzed intramolecular Heck reactions of 2-chloroquinolin-3-yl-(1-homoallyl)alcohols are described to afford facile…”
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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 by Singh, Mrityunjay K., Chandra, Atish, Singh, Bhawana, Singh, Radhey M.

“…A number of 3-homoallyl-2-quinolones have been synthesized from 3-formyl-2-quinolones by reaction with allylindium bromide in aqueous DMF. Intramolecular…”
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Morita-Baylis-Hillman reaction of acrylamide with isatin derivatives by Singh, Radhey Mohan, Bharadwaj, Kishor Chandra, Tiwari, Dharmendra Kumar

“…The Morita-Baylis-Hillman reaction of acrylamide, as an activated alkene, has seen little development due to its low reactivity. We have developed the reaction…”
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TBHP-promoted oxidative cyclization of o-alkynylquinoline aldehydes: Metal/additive-free domino synthesis of pyrano[4,3-b]quinolin-1-ones by Singh, Jay Bahadur, Mishra, Kalpana, Gupta, Tanu, Singh, Radhey M.

“…[Display omitted] •TBHP-promoted synthesis of pyrano[4,3-b]quinolin-1-ones is developed from o-arylalkynylquinoline aldehydes via oxidation followed by…”
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Densely functionalized 1,2-dihydrobenzo[b][1,6]naphthyridines: one-pot synthesis via sequential Ugi and Heck reactions by Asthana, Mrityunjaya, Sharma, Neha, Singh, Radhey M.

“…A facile one-pot synthesis of functionalized 1,2-dihydrobenzo[b][1,6]naphthyridines is described via sequential Ugi four components using…”
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