Chiral synthon obtained with pig liver esterase: Introduction of chiral centers into cyclohexene skeleton.
作者:Susumu KOBAYASHI、Keiji KAMIYAMA、Masaji OHNO
DOI:10.1248/cpb.38.350
日期:——
A versatile chiral synthon, (1R, 6S)-6-methoxycarbonyl-3-cyclohexene-1-carboxylic acid, was obtained by an enantioselective ydrolysis of the corresponding meso diester with pig liver esterase. This enzymatic hydrolysis can easily be carried out on a multi-hundred gram scale. The chiral monoester thus obtained can be further converted into all stereoisomers of 1-amino-2-alkoxycarbonyl-4-cyclohexene derivatives in an enantio- and stereocontrolled manner. These derivatives are considered as potential key intermediates for synthesizing a variety of biologically interesting compounds such as aminocyclitol and carbapenem antibiotics.
利用猪肝酯酶对相应的中二酯类进行对映选择性水解,获得了一种多功能手性合成物--(1R, 6S)-6-甲氧基羰基-3-环己烯-1-羧酸。这种酶水解可以在数百克的规模上轻松进行。由此获得的手性单酯可以对映和立体可控的方式进一步转化为 1-氨基-2-烷氧羰基-4-环己烯衍生物的所有立体异构体。这些衍生物被认为是潜在的关键中间体,可用于合成多种具有生物学意义的化合物,如氨基环糖醇和碳青霉烯类抗生素。