申请人:——
公开号:US20040224395A1
公开(公告)日:2004-11-11
A method has been developed to prepare (E)- and (Z)-2-methyl-2-butenoic acids (2M2BA) from a mixture of (E,Z)-2-methyl-2-butenenitriles (2M2BN) by the regioselective hydrolysis of (E)-2M2BN to (E)-2-methyl-2-butenoicacid (2M2BA) using enzyme catalysts having either a nitrilase activity or a combination of nitrile hydratase and amidase activities. The method provides high yields without significant conversion of (Z)-2M2BN to (Z)-2M2BA. The regioselective hydrolysis of (E)-2M2BN to (E)-2M2BA makes possible the facile separation of (E)-2M2BA from (Z)-2M2BN or (Z)-2-methyl-2-butenamide (2M2BAm), and the subsequent conversion of (Z)-2M2BN or (Z)-2M2BAm to (Z)-2M2BA.
一种制备(E)-和(Z)-2-甲基-2-丁烯酸(2M2BA)的方法已经开发出来,该方法通过使用具有腈酶活性或腈水化酶和酰胺酶活性的酶催化剂,将(E,Z)-2-甲基-2-丁烯腈(2M2BN)的混合物的(E)-2M2BN选择性水解为(E)-2-甲基-2-丁烯酸(2M2BA)。该方法提供高收率,而不会显著转化(Z)-2M2BN为(Z)-2M2BA。将(E)-2M2BN选择性水解为(E)-2M2BA,使得从(Z)-2M2BN或(Z)-2-甲基-2-丁烯酰胺(2M2BAm)中容易分离出(E)-2M2BA,并随后将(Z)-2M2BN或(Z)-2M2BAm转化为(Z)-2M2BA。