Synthesis and Antimicrobial Evaluation of New Pyrano[4,3-b]pyran and Pyrano[3,2-c]chromene Derivatives Bearing a 2-Thiophenoxyquinoline Nucleus
作者:Jigar A. Makawana、Manish P. Patel、Ranjan G. Patel
DOI:10.1002/ardp.201100203
日期:2012.4
A new series of pyrano[4,3‐b]pyran 4a–i and pyrano[3,2‐c]chromene 6a–r derivativesbearing a 2‐thiophenoxyquinoline nucleus were synthesized by reaction of 2‐(4‐(un)‐substituted thiophenoxy)quinoline‐3‐carbaldehydes 2a–i with 6‐methyl‐4‐hydroxypyran‐2‐one 3 and 4‐hydroxy‐6‐(un)‐substituted‐2H‐chromen‐2‐one 5a–b respectively and malononitrile at room temperature in the presence of KOH as a basic catalyst