Chiral Relay Effect: 4-Substituted 1,3-Benzoxazol-2-(3<i>H</i>)-ones as Achiral Templates for Enantioselective Diels−Alder Reactions
作者:Laura Quaranta、Olivier Corminboeuf、Philippe Renaud
DOI:10.1021/ol016966c
日期:2002.1.1
[reaction: see text] A new strategy to control the enantioselectivity of Lewis acid catalyzed reactions has been investigated. The use of N-acryloyl-1,3-benzoxazol-2-(3H)-ones substituted at position 4 leads to the formation of diastereomeric complexes as a result of the presence of a chiral axis. The stereochemical outcome of the reaction is controlled by the chiral catalyst and by the chiral axis
[反应:见正文]研究了控制路易斯酸催化反应对映选择性的新策略。由于存在手性轴,使用在位置4处取代的N-丙烯酰基-1,3-苯并恶唑-2-(3H)-酮导致形成非对映体复合物。反应的立体化学结果由手性催化剂和手性轴控制,从而导致高的对映选择性的提高,并且在一种情况下,导致对映选择性的反转。