Anti-Markovnikov Hydroamination of Unactivated Alkenes with Primary Alkyl Amines
作者:David C. Miller、Jacob M. Ganley、Andrew J. Musacchio、Trevor C. Sherwood、William R. Ewing、Robert R. Knowles
DOI:10.1021/jacs.9b08746
日期:2019.10.23
hydroamination of unactivated olefins with primary alkyl amines to selectively furnish secondary amine products. These reactions proceed through aminium radical cation (ARC) intermediates and occur at room temperature undervisiblelight irradiation in the presence of an iridium-based photocatalyst and an aryl thiol hydrogen atom donor. Despite the presence of excess olefin, high selectivities are observed for
Mechanistic Investigation and Optimization of Photoredox Anti-Markovnikov Hydroamination
作者:Yangzhong Qin、Qilei Zhu、Rui Sun、Jacob M. Ganley、Robert R. Knowles、Daniel G. Nocera
DOI:10.1021/jacs.1c03644
日期:2021.7.14
scale. The selectivity for primaryamine alkylation is derivedfrom the faster addition of the primary ARCs (as compared to secondary ARCs) to alkenes. The turnover of the photocatalyst occurs via the reaction between Ir(II) and a thiyl radical; the in situ formation of an off-cycle disulfide from thiyl radicals suppresses this turnover, diminishing the efficiency of the reaction. With these detailed mechanistic