Facile regioselective synthesis of 2H-thiopyrano[3,2-c]quinolin-5(6H)-ones by thio-Claisen rearrangement
摘要:
A number of 1-alkyl-4-prop-2-ynvlthioquinolin-2(1H)-one derivatives are synthesised by the phase transfer catalyzed reaction of 1-alkyl-4-marcaptoquinolin-2(1H)-ones with different prop-2-ynylic halides. These are then regioselectively cyclised in refluxing chlorobenzene to give hitherto unreported 2H-thiopyrano[32-c]quinolin-5(6H)-ones in 85-90% isolable yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
Facile regioselective synthesis of 2H-thiopyrano[3,2-c]quinolin-5(6H)-ones by thio-Claisen rearrangement
作者:K.C Majumdar、M Ghosh、M Jana、D Saha
DOI:10.1016/s0040-4039(02)00194-6
日期:2002.3
A number of 1-alkyl-4-prop-2-ynvlthioquinolin-2(1H)-one derivatives are synthesised by the phase transfer catalyzed reaction of 1-alkyl-4-marcaptoquinolin-2(1H)-ones with different prop-2-ynylic halides. These are then regioselectively cyclised in refluxing chlorobenzene to give hitherto unreported 2H-thiopyrano[32-c]quinolin-5(6H)-ones in 85-90% isolable yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
Majumdar; Ghosh, Journal of the Indian Chemical Society, 2003, vol. 80, # 11, p. 1077 - 1080