Ln(III)trifluoromethansulfonates in CH2Cl2 efficiently catalyze the aminolysis of trimethylene oxide, 2-octyl-, and 2-phenyloxetane, at r.t., to give the corresponding γ-amino alcohols in very good yields.
Catalytic Asymmetric Synthesis of N-Chiral Amine Oxides
作者:Sukalyan Bhadra、Hisashi Yamamoto
DOI:10.1002/anie.201606354
日期:2016.10.10
Direct asymmetricsynthesis of N‐chiralamine oxides was accomplished (up to 91:9 e.r.) by means of a bimetallic titanium catalyst. A hydroxy group situated at the γ‐position of the N stereocenter enables the desired N‐oxidation through dynamic kinetic resolution of the trivalent amine substrates. The method was further extended to the kinetic resolution of racemic γ‐amino alcohols with a preexisting