The object of the present invention is a novel and simple process forthe production of 1,2-diacyl-sn-glycerols, wherein the acyl groups may be the same or different. According to the invention D-mannitol is reacted with benzene boronic acid or a derivative thereof to form a D-mannitol- monobenzeneboronate which compound is acylated either to form, after removal of the benzeneboronate protective group, a 1,2,5,6-tetraacyl-D-mannitol with four identical acyl groups, or is acylated selectively in two stages, by first acylating the 1,6-hydroxy groups of the boronate protected D-mannitol to form, after removal of the boronate protection, a 1,6-diacyl-D-mannitol, which then is repeatedly reacted with a benzene boronic acid or a derivative thereof and then acylated in the 2-and 5-positions. After removal of the boronate protective group, the tetra-acylated D-mannitol obtained either in the one-stage or two-stage process is split by oxidation to form a 1,2-diacyl-glyceraldehyde which in turn is reduced to the corresponding 1,2-diacyl-sn-glycerol. By means of the invention it is thus possible to prepare 1,2-diacyl-sn-glycerols in which the acyl groups can be the same or different.
                            本发明的目的是一种生产 1,2-
二乙酰基-sn-
甘油的新颖而简单的工艺,其中的酰基可以是相同的,也可以是不同的。根据本发明,D-
甘露醇与苯
硼酸或其衍
生物反应生成 D-
甘露醇-单苯
硼酸酯,该化合物经酰化后,在除去苯
硼酸酯保护基后,形成具有四个相同酰基的 1,2,5,6-四酰基-D-
甘露醇、或者选择性地分两个阶段酰化,首先酰化受
硼酸酯保护的 D-
甘露醇的 1,6-羟基,在去除
硼酸酯保护基后形成 1,6-二酰基-D-
甘露醇,然后与苯
硼酸或其衍
生物反复反应,再在 2 和 5 位酰化。除去
硼酸保护基后,在一步法或两步法中得到的四酰化 D-
甘露醇通过氧化作用分裂成 1,2-
二乙酰基
甘油醛,再还原成相应的 1,2-
二乙酰基-sn-
甘油。通过本发明,可以制备出酰基可以相同或不同的 1,2-
二乙酰基-sn-
甘油。