Metal-Free Visible-Light-Promoted Trifluoromethylation of Vinylcyclopropanes Using Pyrylium Salt as a Photoredox Catalyst
作者:Palasetty Chandu、Krishna Gopal Ghosh、Devarajulu Sureshkumar
DOI:10.1021/acs.joc.9b01033
日期:2019.7.5
Visible-light-induced metal-free trifluoromethylation of activated, carbocyclic, and unactivated vinylcyclopropanes via a ring-opening reaction using the Langlois reagent (CF3SO2Na) is reported to synthesize allylic trifluoromethylated derivatives. Allylic trifluoromethylation was achieved by a photo-oxidative single electron transfer (SET) process at an ambient temperature and under metal-free conditions
据报道,使用Langlois试剂(CF 3 SO 2 Na)通过开环反应,可见光诱导的活化,碳环和非活化乙烯基环丙烷的无金属三氟甲基化反应可合成烯丙基三氟甲基化衍生物。烯丙基三氟甲基化是通过在环境温度和无金属条件下通过光氧化单电子转移(SET)工艺以及使用吡喃鎓盐作为光氧化还原催化剂的可见光照射实现的。所报道的方法具有操作简单,基材范围广,官能团耐受性高和可扩展性的特点。