CAL-B-catalyzed resolution of some pharmacologically interesting β–substituted isopropylamines
作者:Javier González-Sabı́n、Vicente Gotor、Francisca Rebolledo
DOI:10.1016/s0957-4166(02)00336-1
日期:2002.7
Some pharmacologically active amines such as amphetamine, the isomeric o-, m- and p-methoxyamphetamines, 4-phenylbutan-2-amine and mexiletine, as well as their corresponding acetamides, have been prepared in high yields and with very high enantiomeric excesses. The method consists of the Candida antarctica lipase B (CAL-B)-mediated enantioselective acetylation of racemic amines using ethyl acetate
一些药理学活性胺如安非他明,异构ø - ,米-和p -methoxyamphetamines,4-苯基丁-2-胺和美西律,以及它们相应的乙酰胺,都以高产率和具有非常高的对映体过量被制备。该方法由假丝酵母南极假丝酵母B(CAL-B)介导的外消旋胺的对映体选择性乙酰化,使用乙酸乙酯作为溶剂和酰基供体。酶如下Kazlauskas的与所有胺规则,(ř在所有情况下,均会获得(-)-酰胺作为主要对映体。从两种对映异构体的转化率值可以推论,连接到立体中心的取代基的大小决定了其中某些反应的对映选择性和速率。