Catalytic Asymmetric Synthesis of Substituted Morpholines and Piperazines
作者:Huimin Zhai、Andrey Borzenko、Ying Yin Lau、Shin Hye Ahn、Laurel L. Schafer
DOI:10.1002/anie.201206826
日期:2012.12.3
Under two conditions: Hydroamination catalyzed by group 4 metals is featured in the modular and enantioselective synthesis of 3‐substitutedmorpholines and the diastereoselective synthesis of 2,5‐substitutedpiperazines.
Catalytic Asymmetric Synthesis of Morpholines. Using Mechanistic Insights To Realize the Enantioselective Synthesis of Piperazines
作者:Ying Yin Lau、Huimin Zhai、Laurel L. Schafer
DOI:10.1021/acs.joc.6b01884
日期:2016.10.7
and practical catalytic approach for the enantioselective synthesis of 3-substituted morpholines through a tandem sequential one-pot reaction employing both hydroamination and asymmetric transfer hydrogenation reactions is described. Starting from ether-containing aminoalkyne substrates, a commercially available bis(amidate)bis(amido)Ti catalyst is utilized to yield a cyclic imine that is subsequently