Under continuous removal of water, the industrial protease Alcalase
allows selective synthesis of α-carboxylic acid methyl,
ethyl, benzyl, allyl, 2-(trimethylsilyl)ethyl, and tert-butyl
esters of amino acids and peptides under mild conditions in very
high yields. The purified yields range from 72% to 92%.
enzymes - amino acids - esterification - esters - protecting groups