Biphenyl aldehyde-based ternary catalytic system catalyzed Tsuji–Trost allylation of N-unprotected amino acid esters
作者:Zhao-Wei Wu、Wei Wen、Qi-Xiang Guo
DOI:10.1016/j.tet.2022.133235
日期:2023.2
the direct α-allylation reaction of N-unprotected amino acid esters and allyl alcohol acetates. The chemoselectivity of C-allylation and N-allylation is efficiently controlled and various racemic α,α-disubstituted amino acid esters are generated in good-to-high yields. The target products can be readily converted into structurally diverse α,α-disubstituted amino acids at a gram scale.
合理设计了一种基于联苯醛的高效三元催化体系,并将其应用于N-未保护氨基酸酯和烯丙醇乙酸酯的直接α-烯丙基化反应。C-烯丙基化和N-烯丙基化的化学选择性得到有效控制,各种外消旋 α,α-二取代氨基酸酯的产率从好到高。目标产物可以很容易地以克级转化为结构多样的 α,α-二取代氨基酸。