Enantioselective Henry reaction catalyzed by C2-symmetric chiral diamine–copper(II) complex
作者:Sermadurai Selvakumar、Dhanasekaran Sivasankaran、Vinod K. Singh
DOI:10.1039/b904254g
日期:——
A copper(II) complex of C2-symmetric diamine has been proved to be an efficient catalyst for the enantioselective Henry reaction between nitroalkanes and various aldehydes to provide β-hydroxy nitroalkanes in high yields (up to 97%), moderate diastereoselectivities (up to 71:29) and excellent enantiomeric excesses (up to 96%). The chiral nitroaldol adduct obtained has been further converted into chiral
事实证明,C 2对称二胺的铜(II)络合物是硝基链烷烃与各种醛之间对映选择性亨利反应的有效催化剂,以高产率(高达97%),中等非对映选择性(高达90%以上)提供β-羟基硝基链烷烃。至71:29)和出色的对映体过量(高达96%)。所获得的手性硝基醛醇加合物在几个步骤中已进一步转化为手性氮丙啶。