Nitrile biotransformations for the practical synthesis of highly enantiopure azido carboxylic acids and amides, ‘click’ to functionalized chiral triazoles and chiral β-amino acids
作者:Da-You Ma、De-Xian Wang、Qi-Yu Zheng、Mei-Xiang Wang
DOI:10.1016/j.tetasy.2006.08.021
日期:2006.9
(R)-12a underwent ‘click’ reactions with diethyl acetylenedicarboxylate and phenylacetylene to produce functionalized chiral triazoles 14 and 15, respectively. The easy preparation of the starting nitrile substrates, highly efficient and enantioselective biotransformation reactions, and versatile utility of the resulting functionalized azido carboxylic acids and amide derivatives, render this method very
在非常温和的条件下,使用红球菌红球菌AJ270(一种含有腈水化酶/酰胺酶的微生物全细胞催化剂)进行消旋叠氮腈的生物转化,可得到高度对映纯的(R)-α-芳基甲基和(+)-α-环己基甲基-β -叠氮基丙酸及其(S)-和(-)-羧酰胺衍生物,收率极高。将得到的官能化的手性有机叠氮化物以直接的方式转化为一对α-苄基-β-氨基酸(R)-13和(S)-13的对映体。叠氮基羧酰胺(S)-11a和叠氮基羧酸(R)-12a与乙炔二羧酸二乙酯和苯乙炔进行“点击”反应,分别生成官能化的手性三唑14和15。起始腈底物的容易制备,高效和对映选择性的生物转化反应以及所得官能化的叠氮基羧酸和酰胺衍生物的通用用途,使得该方法在有机合成中非常有吸引力且实用。