General Synthesis of <i>N</i>-Alkylation of Amines with Secondary Alcohols via Hydrogen Autotransfer
作者:Murugan Subaramanian、Siba P. Midya、Palmurukan M. Ramar、Ekambaram Balaraman
DOI:10.1021/acs.orglett.9b02990
日期:2019.11.15
Direct catalytic N-alkylation of amines with secondary alcohols via hydrogen autotransfer (HA) strategy is very challenging and has been scarcely reported, even under precious metal catalysis. Herein, an efficient N-alkylation of amines, including benzylamines using secondary alcohols as alkylating agents, is reported. This reaction is catalyzed by a molecularly defined NNN-Ni(II) pincercomplex, and
Visible-Light-Mediated Umpolung Reactivity of Imines: Ketimine Reductions with Cy<sub>2</sub>NMe and Water
作者:Rui Wang、Mengyue Ma、Xu Gong、Grace B. Panetti、Xinyuan Fan、Patrick J. Walsh
DOI:10.1021/acs.orglett.8b00778
日期:2018.4.20
carbanionic reactivity of imines mediated by photoredox catalysis is demonstrated. The umpolung imine reactivity is exemplified by proton abstraction from water as a key step in the reduction of benzophenone ketimines to amines (up to 98% yield). Deuterium is introduced into amines efficiently using D2O as an inexpensive deuterium source (≥95% D ratio). The mechanism of this unusual transformation