water, the industrial protease Alcalase allows selective synthesis of α-carboxylic acid methyl, ethyl, benzyl, allyl, 2-(trimethylsilyl)ethyl, and tert-butyl esters of aminoacids and peptides under mild conditions in very high yields. The purified yields range from 72% to 92%. enzymes - aminoacids - esterification - esters - protecting groups
Improved efficiency and selectivity in peptide synthesis: Use of triethylsilane as a carbocation scavenger in deprotection of t-butyl esters and t-butoxycarbonyl-protected sites
作者:Anita Mehta、Rabih Jaouhari、Timothy J. Benson、Kenneth T. Douglas
DOI:10.1016/s0040-4039(00)79116-7
日期:1992.9
triethylsilane as a carbocation scavenger in the presence of trifluoroacetic acid in dichloromethane leads to increased yields, decreased reaction times, simple work-up and improved selectivity for the deprotection of t-butyl ester and t-butoxycarbonyl sites in protected amino-acids and peptides in the presence of otheracid-sensitiveprotectinggroups such as the benzyloxycarbonyl, 9-fluorenylmethoxycarbonyl