Cyclopropenimine-Catalyzed Enantioselective Mannich Reactions of <i>tert</i>-Butyl Glycinates with <i>N</i>-Boc-Imines
作者:Jeffrey S. Bandar、Tristan H. Lambert
DOI:10.1021/ja407277a
日期:2013.8.14
shown to catalyze Mannichreactions between glycine imines and N-Boc-aldimines with high levels of enantio- and diastereocontrol. The reactivity of 1 is shown to be substantially greater than that of a widely used thiourea cinchona alkaloid-derived catalyst. A variety of aryl and aliphatic N-Boc-aldimines are effective substrates for this transformation. A preparative-scale reaction to deliver >90 mmol
CYCLOPROPENIMINE CATALYST COMPOSITIONS AND PROCESSES
申请人:THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
公开号:US20140288323A1
公开(公告)日:2014-09-25
The present invention provides, inter alia, a cyclopropenimine Brønsted base catalyst and a cyclopropenimine scaffold for use as a Brønsted base catalyst. This cyclopropenimine has the structure (100). Methods for making such a cyclopropenimine are also provided. Further provided are processes for carrying out an organic synthetic reaction and processes for catalyzing a proton transfer reaction enantioselectively using such a cyclopropenimine Brønsted base catalyst.