A process for the selective hydrolysis of triglycerides to mixtures of 1,3 or 2,3-diacyl glycerides and 2-acyl glycerides is disclosed. This process uses an alkyl alcohol selected from the group consisting of 2-methyl-2-propanol, 2-butanol and the primary, secondary or tertiary branched or straight chain alkyl alcohols having from 5 to 8 carbon atoms, and mixtures thereof, an aqueous buffer system and a 1,3-lipase. The 2-acyl glycerides in the mixture are esterified to make stereospecific 1,2-diacyl glycerides or 2,3-diacyl glycerides with acid anhydrides and a lipase catalyst. Under the reaction conditions, there is little rearrangement of the diacyl glycerides in the mixture and less than 20% triglyceride is formed. Stereospecific 1,2,4-triglycerides can be made from these materials by standard esterification reactions under conditions which control rearrangement.
公开了一种用于选择性
水解
甘油三酯制备1,3或2,3-二酰基
甘油和2-酰基
甘油混合物的工艺。该工艺使用从以下群体中选择的烷基醇:2-甲基-2-
丙醇、
2-丁醇和具有5至8个碳原子的一次、二次或三次支链或直链烷基醇及其混合物,
水相缓冲体系和1,3-
脂肪酶。混合物中的2-酰基
甘油通过酸酐和
脂肪酶催化剂酯化以制备立体特异性的1,2-二酰基
甘油或2,3-二酰基
甘油。在反应条件下,混合物中的二酰基
甘油重排程度较小,三酯的形成量少于20%。可以通过控制重排的条件,在这些材料中通过标准酯化反应制备立体特异性的1,2,4-三酯。