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通过路易斯酸催化的三组分缩合反应,高非对映选择性合成 α-羟基-β-氨基酸衍生物。

A highly diastereoselective synthesis of α-hydroxy-β-amino acid derivatives via a Lewis acid catalyzed three-component condensation reaction.

机构信息

DISMAB, Sezione di Chimica Organica A. Marchesini Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy.

出版信息

J Org Chem. 2010 Nov 5;75(21):7099-106. doi: 10.1021/jo1011762.

DOI:10.1021/jo1011762
PMID:20945864
Abstract

A very efficient three-component synthesis of a series of syn α-hydroxy-β-amino esters, obtained in high diastereoselection and yield, was realized starting from an aldehyde, benzylamine, and the ketene silyl acetals derived from Ley's lactones. The synthetic protocol was optimized and the above compounds were obtained without the isolation of intermediates. The origin of the observed diastereoselection was investigated through a computational model of the key reaction step.

摘要

以醛、苄胺和 Ley 内酯衍生的烯酮硅基缩醛为原料,高效、高非对映选择性和产率地合成了一系列 syn α-羟基-β-氨基酯。对合成方案进行了优化,无需分离中间体即可得到上述化合物。通过关键反应步骤的计算模型研究了观察到的非对映选择性的起源。

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