S-ethyl thiooctanoate as acyl donor in lipase catalysed resolution of secondary alcohols
作者:Hans Frykman、Niklas Öhrner、Torbjörn Norin、Karl Hult
DOI:10.1016/s0040-4039(00)91797-0
日期:1993.2
alcohols by lipase catalysed transesterification, resulted in an efficient displacement of the equilibrium towards esterification of the alcohol. A lipase (component B) from Candida antarctica was used as the catalyst. On a semi-preparative scale, 0.5 g of 2-octanol was resolved in less than one hour, affording an enantiomeric excess of >98% of the remaining alcohol and >97% of the produced ester. Three
在脂肪酶催化的酯交换反应中仲硫醇的拆分中,使用S-硫代辛酸乙酯作为酰基供体,可导致平衡的有效取代,朝着醇的酯化转移。使用来自南极假丝酵母的脂肪酶(组分B)作为催化剂。在半制备规模上,在不到一小时的时间内分解了0.5克2-辛醇,得到对映体过量> 98%的剩余醇和> 97%的所产生的酯。还以良好的光学收率拆分了其他三种醇,1-苯基乙醇,1-环己基和反-2-甲基环己醇。在制备规模上转化50%后,得到15g醇,可以得到2-辛醇的(S)-对映异构体,其对映体过量为96%。这 (水解所产生的酯后,分离出R 1-对映异构体,其对映体过量为97%。