Resolution of racemic flurbiprofen by lipase-mediated esterification in organic solvent
作者:Raffaele Morrone、Giovanni Nicolosi、Angela Patti、Mario Piattelli
DOI:10.1016/0957-4166(95)00223-c
日期:1995.7
unsuitable for large scale preparation. Direct esterification of 1 with methanol in acetonitrile promoted by Novozym® 435 proved to be the best method since it gave, via a twofold kinetic resolution, S-flurbiprofen with excellent enantiomeric excess. The R-flurbiprofen methyl ester formed in the reaction can be converted into the starting rac-flurbiprofen by alkaline hydrolysis or, alternatively, into
研究了通过生物催化方法拆分rac-氟比洛芬,2-氟-α-甲基-[1,1'-联苯] -4-乙酸(1)。rac- flurbiprofen甲酯(2)在水性有机介质中的酶促水解结果不佳。由固定的南极假丝酵母脂肪酶(Novozym?435)在有机溶剂中介导的同一酯的对映异构体过量进行,但产物的分离需要色谱分离,因此不适合大规模制备。Novozym®435促进1与甲醇在乙腈中的直接酯化是最好的方法,因为它可以通过动力学拆分的两倍,S-氟比洛芬具有出色的对映体过量。反应中形成的R-氟比洛芬甲酯可以通过碱水解转化为起始的rac-氟比洛芬,或者通过用酸水解而转化为R-氟比洛芬。