Results 111 to 120 of about 123,501 (158)

XAT-Generated Azirinyl Radicals in Selective Giese-Type Alkylation of 2H-Azirines.

Organic Letters
We report a radical strategy for direct C2-alkylation of 2H-azirines via generation of elusive 2H-azirinyl radicals. These highly reactive intermediates are accessed under mild halogen-atom transfer conditions from readily available 2-haloazirines.
A. Agafonova, Julia I Pavlenko, Timur O Zanakhov, A. Khlebnikov, M. Novikov   +4 more
semanticscholar   +1 more source

Modular Approach to Non-aromatic and Aromatic Pyrroles through Gold-catalyzed [3+2] Cycloaddition of 2H-Azirines and Ynamides

Organic Chemistry Frontiers, 2022
The developed modular approach to hard-to-reach non-aromatic 3H- and 2H-pyrroles is based on the integration of 2H-azirines and ynamides.
N. Shcherbakov, Gleb D Titov, Elena I Chikunova, I. Filippov, N. Rostovskii, V. Kukushkin, A. Dubovtsev   +6 more
semanticscholar   +1 more source

Enantioselective addition of organolithium reagents to a 2H-azirine

Tetrahedron: Asymmetry, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Erik Risberg, Peter Somfai
openaire   +1 more source

Cascade Reaction of 2H-Azirines and o-Bromoaryl Isothiocyanates: An Access to Benzo[d]imidazo[2,1-b]thiazoles.

Journal of Organic Chemistry
A novel Cs2CO3-promoted method for the synthesis of benzo[d]imidazo[2,1-b]thiazol derivatives from 2H-azirines and o-bromoaryl isothiocyanates was successfully explored via C-S bond formation under transition-metal-free condition.
Mengfan Li, Wen Cheng, Hao Tang, Yuxi Wang, Qiurou Yu, Qingwei Wang, W. Tang, Weiyin Yi   +7 more
semanticscholar   +1 more source

Microwave spectrum of 3-methyl-2H-azirine

Journal of Molecular Structure, 1997
Abstract The microwave spectrum of 3-methyl-2H-azirine produced by pyrolyzing N -chloro-2-methylaziridine was observed. This new, unstable molecule was identified based on a comparison of observed molecular constants and those determined by an ab initio MO calculation. The rotational constants are A = 22338.04(4), B = 6618.622(9), and C = 5464.
Masaaki Sugie, Harutoshi Takeo, Chi Matsumura   +2 more
openaire   +1 more source

Solvent- and Catalyst-Controlled Regioselective O- and N-Alkylation of 2-Pyridones by 2H-Azirines.

Journal of Organic Chemistry
The synthesis of O-substituted 2-hydroxypyridines and N-substituted 2-pyridones, crucial for many bioactive compounds and drugs, faces challenges due to the tautomeric nature of 2-pyridones, which complicates selective alkylation.
Subrata Biswas, Surajit Duari, Srabani Maity, Arnab Roy, Sourav Guchhait, Asma M. Elsharif, S. Biswas   +6 more
semanticscholar   +1 more source

Organocatalyzed nucleophilic addition of pyrazoles to 2H-azirines: asymmetric synthesis of 3,3-disubstituted aziridines and kinetic resolution of racemic 2H-azirines

Chemical Communications, 2016
An asymmetric nucleophilic addition of pyrazoles to 2H-azirines via organocatalytic kinetic resolution afforded chiral aziridines and azirines simultaneously.
Dong, An, Xukai, Guan, Rui, Guan, Lajiao, Jin, Guangliang, Zhang, Suoqin, Zhang   +5 more
openaire   +2 more sources

Equilibration of 2H-azirine with vinylnitrene

Journal of the Chemical Society, Chemical Communications, 1972
Treatment of 2,3-diaryl-2H-azirine-2-carboxamide with triphenylphosphine and carbon tetrachloride affords the triphenyliminophosphorane (4).
openaire   +1 more source

Asymmetric radical additions of trialkylboranes to 2H-azirine-3-carboxylates

Chemical Communications, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Erik, Risberg, Andreas, Fischer, Peter, Somfai   +2 more
openaire   +2 more sources

Brønsted acid-catalyzed regioselective ring opening of 2H-azirines by 2-mercaptopyridines and related heterocycles; one pot access to imidazo[1,2-a]pyridines and imidazo[2,1-b]thiazoles.

Organic and biomolecular chemistry
A catalytic and versatile synthetic method for the synthesis of imidazo[1,2-a]pyridines has been developed. Brønsted acid-catalysis plays a major role in the regioselective ring opening of 2H-azirines.
Subrata Biswas, Arnab Roy, Surajit Duari, Srabani Maity, Asma M. Elsharif, S. Biswas   +5 more
semanticscholar   +1 more source