Mild, selective cleavage of amino acid and peptide β-(trimethylsilyl)ethoxymethyl (SEM) esters by magnesium bromide
作者:Wei-Chuan Chen、Matthew D. Vera、Madeleine M. Joullié
DOI:10.1016/s0040-4039(97)00863-0
日期:1997.6
β-(trimethylsilyl)ethoxymethyl (SEM) esters of aliphatic acids. This methodology has now been extended to amino acid and peptide derivatives in the presence of protecting groups typically encountered in peptide chemistry, including the Boc, Cbz, Fmoc and Troc carbamates as well as benzyl-, tert-butyl- and tert-butyldimethylsilyl ethers. The stability of fluoride sensitive protecting groups to magnesium
先前已显示溴化镁醚化物可裂解脂肪族酸的β-(三甲基甲硅烷基)乙氧基甲基(SEM)酯。在存在于肽化学中通常遇到的保护基的情况下,该方法现已扩展至氨基酸和肽衍生物,包括Boc,Cbz,Fmoc和Troc氨基甲酸酯以及苄基,叔丁基和叔丁基二甲基甲硅烷基醚。氟化物敏感的保护基团对溴化镁的稳定性提高了有机合成中SEM酯去除的选择性。