Enantioselective Michael Addition to α,β-Unsaturated Aldehydes: Combinatorial Catalyst Preparation and Screening, Reaction Optimization, and Mechanistic Studies
作者:Ivana Fleischer、Andreas Pfaltz
DOI:10.1002/chem.200902449
日期:2010.1.4
Shortcut to chiral catalysts: An efficient combinatorial strategy based on back reaction screening by ESI‐MS allows rapid evaluation of organocatalysts for the asymmetric Michael addition to α,β‐unsaturated aldehydes (see scheme). An unexpected nonlinear effect has been observed in this reaction, resulting from a double nucleophilic–electrophilic activation mechanism involving two catalyst molecules
手性催化剂的捷径:基于ESI-MS逆反应筛选的有效组合策略可快速评估有机催化剂中α,β-不饱和醛的不对称Michael加成反应(参见方案)。在该反应中观察到了意外的非线性效应,这是由涉及两个催化剂分子的双亲核-亲电活化机制引起的。