Photoredox-Catalyzed C<sub>α</sub>–H Cyanation of Unactivated Secondary and Tertiary Aliphatic Amines: Late-Stage Functionalization and Mechanistic Studies
作者:Ozgur Yilmaz、Martins S. Oderinde、Marion H. Emmert
DOI:10.1021/acs.joc.8b01700
日期:2018.9.21
general, high-yielding amine Cα–H cyanation protocol via photoredox catalysis. Inexpensive NaCN is employed as the cyanide source and air is the external oxidant, resulting in mild and highly functional group tolerant conditions. Notably, efficient Cα–H cyanations of secondary and tertiary aliphatic amines and of complex, biologically active compounds (drugs) can be performed using the established methodology
本文描述了开发和一个一般地,高产胺的C机理研究α -H氰化经由photoredox催化协议。廉价的NaCN用作氰化物源,空气是外部氧化剂,导致温和且高度官能团耐受的条件。值得注意的是,高效的C α -H的cyanations二级和三级可使用所建立的方法进行脂族胺和复杂的,生物活性化合物(药物)的。机理研究表明,该羧酸添加剂具有三种作用:形成稳定的半胱氨酸中间体,通过使底物质子化来防止催化剂分解以及调节光激发催化剂物种的荧光猝灭。