A general, efficient, and substrate-controlled regiodivergent trifluoroacetylation of carbazoles has been developed through Friedel–Crafts acylation. This strategy was applicable to a wide scope of readily available substituted carbazoles at air atmosphere without using a metal catalyst, affording the corresponding trifluoroacetylated carbazoles in up to 99% yield. The divergency of the products and
通过Friedel-Crafts酰化反应,开发了一种通用,有效且受底物控制的
咔唑区域发散性三
氟乙酰化试剂。该策略适用于在大气气氛下不使用
金属催化剂的各种易于获得的取代
咔唑,从而以高达99%的收率提供了相应的三
氟乙酰化
咔唑。已经基于
咔唑环上的不同取代基说明了产物的发散性和取向规则。该方法还可以扩展到首次实现的
氯二
氟乙酰化和五
氟丙酰化
咔唑的合成。