A process for the manufacture of a tocyl acylate or a tocopheryl acylate comprises reacting tocol or a tocopherol with an acylating agent in the presence of a catalyst of the general formula HC1R2R3, wherein R1, R2 and R3 each signify the sulpho group, or R1, R2 and R3 each signify a perfluoroalkylsulphonyl group whereby at least two of R1, R2 and R3 are identical such perfluoroalkyl-sulphonyl groups, or R1 signifies the pentafluorophenyl-sulphonyl group and R2 and R3 each signify an identical perfluoroalkylsulphonyl group. The main commercial form of vitamin E, being (all-rac)-α-tocapheryl acetate, can be manufactured by acylation of (all-rac)-α-tocopherol according to this process.
一种制备
生育酚酰基酯或
生育酚酰基酯的方法包括在催化剂的存在下,将
生育酚或生育醇与酰化试剂反应,所述催化剂具有通式HC1R2R3,其中R1、R2和R3分别表示磺基,或R1、R2和R3分别表示
全氟烷基磺酰基,其中至少有两个R1、R2和R3是相同的
全氟烷基磺酰基,或R1表示
五氟苯基磺酰基,R2和R3各自表示相同的
全氟烷基磺酰基。
维生素E的主要商业形式是(全反式)-α-
生育酚醋酸酯,可以通过按照这种方法对(全反式)-α-生育醇进行酰基化来制造。