Effect of heterocyclic ring system on formation of dimeric quinolones under catalyst-free conditions: a green approach
作者:Bandi Madhu、B. Raja sekar、C. H. Venkata Ramana Reddy、P. K. Dubey
DOI:10.1007/s11164-017-3032-2
日期:2017.12
The intermediate-dependent green and efficientsynthesis of dimeric quinolones 4a–l and 7a–l by the Knoevenagel condensation followed by Michael-type addition of 4-hydroxy-1-methylquinolin-2(1H)-one 1a, b to indole-3-aldehydes 2a–f and aromatic aldehydes 5a–l in water through the condensed compound 3a–l under catalyst-free conditions is described. This reaction was found to be environmentally friendly
Diversity-oriented Multicomponent Synthesis of Bisquinolones under Green Conditions
作者:Madhu Bandi、Ch.Venkata Ramana Reddy
DOI:10.1002/jhet.2994
日期:2017.11
A diversity‐oriented green and eco‐friendly synthesis of bisquinolones have been developed by simply condensation of N‐methylquinolone (1), with various benzaldehydes 2a–n and aniline (3) under catalyst‐free conditions. An exciting feature of this communication is the product formation that depends on the intermediate (II) generated in the reaction mechanism.
A highly efficient and green cascade synthesis of 3-methyl-substituted-4-hydroxy-1-methyl-quinolin-2(1H)-ones under solvent- and catalyst-free conditions
作者:Subrahmanya Ishwar Bhat、Darshak R. Trivedi
DOI:10.1039/c3ra45208e
日期:——
protocol for the synthesis of 3,3′-methanediylbis(4-hydroxy-1-methylquinolin-2(1H)-one) (MDBHQ) derivatives and 3-((2-amino-6-oxocyclohex-1-enyl)methyl)-4-hydroxy-1-methylquinolin-2(1H)-one (AOCHQ) derivatives has been developed via a cascade Knoevenagel–Michael reaction. The products were obtained in high yield under neat reaction conditions without any work-up or chromatographicpurification. The generality
A novel synthesis of 3-((benzo[d]thiazol-2-ylamino)(phenyl)methyl)-4-hydroxy-1-methylquinolin-2(1H)-one via consecutive C–C and C–N bond formation in water
作者:Maruti B. Yadav、Sandip S. Vagh、Yeon Tae Jeong
DOI:10.1007/s11164-020-04173-0
日期:2020.8
simple, efficient, and eco-friendlyprotocol has been developed for the synthesis of novel 3-((benzo[d]thiazol-2-ylamino)(4-methoxyphenyl)methyl)-4-hydroxy-1-methylquinolin-2(1H)-one derivatives using a one-pot C–C and C–N bond forming strategy from the reaction of 4-hydroxy-1-methylquinolin-2(1H)-one, 2-aminobenzothiazole and aromatic aldehydes in aqueous solvent without using any metal catalyst. Several