Candida antarctica lipases acting as versatile catalysts for the synthesis of enantiopure (R)- and (S)-1-(2-phenylthiazol-4-yl)ethanamines
作者:Alexandra Radu、Mădălina Elena Moisă、Monica Ioana Toşa、Norbert Dima、Valentin Zaharia、Florin Dan Irimie
DOI:10.1016/j.molcatb.2014.05.007
日期:2014.9
phenylthiazole-based amines by enantiomer-selective acylation of racemic amines and by hydrolysis of the corresponding racemic amides using lipase B from Candida antarctica (Novozyme 435) as chiral catalyst was performed with good yields and excellent enantioselectivities. In order to prevent the frequently occurring partial racemization of enantiopure amides during chemical hydrolysis to the corresponding (R)-amines
通过外消旋胺的对映异构体选择性酰化和使用南极假丝酵母的脂肪酶B (Novozyme 435)作为手性催化剂,通过水解相应的外消旋酰胺水解四种新的苯基噻唑基胺的两种对映异构体,均具有良好的收率和出色的对映选择性。为了防止对映体纯酰胺在化学水解过程中经常发生部分外消旋化成相应的(R)-胺,通过轻度酶促水解,用固定在硅藻土上的南极衣藻的脂肪酶A对N-酰化(R)-对映体进行脱保护。也被开发了。