Towards Sustainable Amino Acid Derived Organocatalysts for Asymmetric <i>syn</i>
-Aldol Reactions
作者:Vasiliy V. Gerasimchuk、Alexandr S. Kucherenko、Artem N. Fakhrutdinov、Michael G. Medvedev、Yulia V. Nelyubina、Sergei G. Zlotin
DOI:10.1002/ejoc.201700166
日期:2017.5.3
side-processes responsible for the fast deactivation of primary amino acid derived organocatalysts in asymmetric aldol reactions are identified. A new ionic-liquid-supported (S)-valine-/(S)-α,α-diphenylserinol-derived catalyst (9) is designed on the basis of these results and exhibits much better recyclability in asymmetric syn-aldol reactions between hydroxyacetone and aldehydes. Furthermore, this catalyst
鉴定了在不对称醛醇反应中导致伯氨基酸衍生的有机催化剂快速失活的不良副过程。基于这些结果设计了一种新的离子液体负载的 (S)-缬氨酸-/(S)-α,α-二苯基丝氨醇衍生催化剂 (9) 并在羟基丙酮之间的不对称合成羟醛反应中表现出更好的可回收性和醛类。此外,该催化剂似乎可用于通过不对称合成羟醛/内酯化级联反应立体选择性合成天然存在的 1(3H)-isobenzofuran-1-one 支架。