Tandem cyclization: one pot regioselective synthesis of thieno[3,2-c]quinolin-4(5H)-one derivatives
作者:K.C Majumdar、M Ghosh
DOI:10.1016/s0040-4020(02)01303-0
日期:2002.12
3-dihydro-5-alkylthieno[3,2-c]quinolin-4(5H)-ones are regioselectively synthesized in 80–90% yield from 4-(4′-aryloxybut-2′-ynyl)thioquinolin-2(1H)-ones by the oxidation with 1 equiv. of m-CPBA at 0–5°C for 1 h followed by heating under reflux in chloroform and subsequent treatment with 20% aqueous KOH. The substrate, sulfides were prepared by PTC alkylation of 4-mercaptoquinolin-2(1H)-one with 1-aryloxy-4-chlorobut-2-ynes
从4-(4)区域选择性地合成了许多迄今未报道的3-(芳氧基乙酰基)-2,3-二氢-5-烷基硫代[3,2 - c ]喹啉-4(5 H)-一。 '-芳氧基丁-2'-炔基)硫喹啉-2(1 H)-经1当量氧化而得。在0-5℃下,将1mL的m- CPBA在室温下加热1小时,然后在氯仿中加热回流,随后用20%的KOH水溶液处理。通过4-巯基喹啉-2(1 H)-1与1-芳氧基-4-氯丁-2-炔烃的PTC烷基化制备底物硫化物。