α,β-Unsaturated Aldehydes as Substrates for Asymmetric CC Bond Forming Reactions with Thiamin Diphosphate (ThDP)-Dependent Enzymes
作者:Anabel Cosp、Carola Dresen、Martina Pohl、Lydia Walter、Caroline Röhr、Michael Müller
DOI:10.1002/adsc.200700550
日期:2008.3.25
decarboxylase (PDC) from Saccharomyces cerevisiae provide different CC bond forming possibilities of α,β-unsaturated aldehydes with aliphatic and aromatic aldehydes. Structure elucidation and determination of the absolute configuration of the products, which were obtained with high regio- and stereoselectivity were carried out. Selective 1,2-reactivity with yields of 75% and >98% ee, for one single isomer
酶裂解酶的苯甲醛(BAL)从荧光假单胞菌,苯甲酰甲酸脱羧酶(BFD)恶臭假单胞菌从和丙酮酸脱羧酶(PDC)酿酒酵母提供不同的CC键形成与脂肪族和芳香族醛的α可能性,β不饱和醛。进行了结构阐明和确定了产物的绝对构型,这些产物具有很高的区域选择性和立体选择性。通过选择合适的酶和合适的底物,获得了一种单一异构体(A)的选择性1,2反应性,产率为75%ee和> 98%ee。通过改变酶或底物的区域异构羟基酮可以获得ee高达99%以上的C。通过应用不同的依赖ThDP的酶作为催化剂,可以大大促进这些新的手性结构单元在天然产物或生物活性物质合成中的应用。