Acylation of β-Amino Esters and Hydrolysis of β-Amido Esters: <i>Candida antarctica</i>
Lipase A as a Chemoselective Deprotection Catalyst
作者:Harri Mäenpää、Liisa T. Kanerva、Arto Liljeblad
DOI:10.1002/cctc.201501381
日期:2016.3.18
tert‐butyl esters of 3‐amino‐3‐phenylpropanoic acid (E>100), 3‐amino‐4‐methylpentanoic acid (E>100) and 3‐aminobutanoic acid (E=60) on 1.0–2.0 m scale. With the N‐acylated resolution products, the exceptional ability of CAL‐A to hydrolyse amides and bulky tert‐butyl esters was then studied. In all N‐acylated tert‐butyl esters, chemoselectivity favoured the amide bond cleavage. The tert‐butyl ester bond was
将南极假丝酵母(CAL-A)中的脂肪酶A在丁酸乙酯中进行N-酰化反应用于动力学拆分3-氨基-3-苯基丙酸(E > 100),3-氨基-4-甲基戊酸的叔丁基酯酸(E > 100)和3-氨基丁酸(E = 60),范围为1.0-2.0 m。然后,使用N-酰化的拆分产品,研究了CAL-A水解酰胺和大体积叔丁酯的出色能力。在所有的N-酰化的叔丁基酯中,化学选择性有利于酰胺键的裂解。该叔叔丁基酯键与3-氨基-3-苯基丙酸酯保持完整,而3-氨基-4-甲基戊酸酯和3-氨基丁酸酯则由CAL-A催化叔丁酯水解,然后再进行酰胺水解。