Multicomponent reactions for facile access to coumarin-fused dihydroquinolines and quinolines: synthesis and photophysical studies
作者:Md. Nasim Khan、Suman Pal、Shaik Karamthulla、Lokman H. Choudhury
DOI:10.1039/c4nj00630e
日期:——
straightforward method for facileaccess to coumarin-fused dihydroquinolines (4) has been developed using the microwave-assisted multicomponent reactions of 4-hydroxycoumarin, aldehydes and aromatic amines in water catalyzed by bismuth triflate. Under solvent-free and conventional heating conditions, the same combination provided the corresponding coumarin-fused quinolines (5). An alternative and rapid