Application of Isocyanides Derived from α-Amino Acids as Substrates for the Ugi Reaction
作者:Stanisław Berłożecki、Wiktor Szymański、Ryszard Ostaszewski
DOI:10.1080/00397910802222787
日期:2008.8.19
Abstract A systematic study on the influence of Lewis acid, solvent, and temperature on the stereochemical course of the Ugi reaction was performed to find conditions in which the isocyanides derived from enantiopure α-amino acids do not racemize. After a series of experiments, dichloromethane was used as a solvent and BF3 · OEt2 as a Lewis acid catalyst. This combination allowed us to obtain a product
摘要 系统研究了路易斯酸、溶剂和温度对 Ugi 反应立体化学过程的影响,以寻找源自对映体纯 α-氨基酸的异氰化物不会外消旋的条件。经过一系列实验,二氯甲烷为溶剂,BF3·OEt2为路易斯酸催化剂。这种组合使我们能够在模型反应中获得具有 99% 非对映异构体比率 (dr) 的产物,具有一组组织蛋白酶 K 抑制剂的结构基序。