Lewis base/Brønsted acid cocatalysis for electrophilic thiocyanation of olefins is reported. Using a combination of triphenylphosphineselenide and diphenyl phosphate as a catalyst, a wide range of unsaturated amides and thioamides underwent thiocyanation to furnish thiocyanated thiazoline and oxazoline derivatives in high yields (up to 97%).
Copper-Catalyzed Divergent Trifluoromethylation/Cyclization of Unactivated Alkenes
作者:Jing Zheng、Ziyang Deng、Yan Zhang、Sunliang Cui
DOI:10.1002/adsc.201500965
日期:2016.3.3
Most of the precedent copper‐catalyzed trifluoromethylation reactions of unactivatedalkenes concern terminalalkenes, and these processes are terminated in elimination, or nucleophilic addition, or semipinacol rearrangement, or CH bond functionalization steps. In this study, we develop a trifluoromethylation method for both unactivatedterminal and internal alkenes to enable divergent late‐stage