Difluorocarbene-Triggered Cyclization: Synthesis of (Hetero)arene-Fused 2,2-Difluoro-2,3-dihydrothiophenes
作者:Huamin Liang、Ran Liu、Min Zhou、Yue Fu、Chuanfa Ni、Jinbo Hu
DOI:10.1021/acs.orglett.0c02688
日期:2020.9.4
An efficient method for the synthesis of (hetero)arene-fused 2,2-difluoro-2,3-dihydrothiophene derivatives using readily available sodium chlorodifluoroacetate (ClCF2CO2Na) has been developed. This transformation is achieved through a combination of a thiolate with difluorocarbene, followed by intramolecular nucleophilic addition to a ketone, cyano, or ester functional group.
已经开发了使用容易获得的氯二氟乙酸钠(ClCF 2 CO 2 Na)合成(杂)芳烃稠合的2,2-二氟-2,3-二氢噻吩衍生物的有效方法。通过硫醇盐与二氟卡宾的组合,然后向酮,氰基或酯官能团的分子内亲核加成,可以实现这种转化。