申请人:KURARAY CO., LTD.
公开号:EP0771778A2
公开(公告)日:1997-05-07
An all trans-form polyprenol is obtained by;
(A) subjecting a 3,7-dimethyl-6-hydroxy-7-octen-1-ol derivative to five-carbon lengthening reaction m-times which comprises reacting with 2-methyl-3,3-dimethoxy-1-butene and reducing the carbonyl group of the resulting compound, to obtain an allyl alcohol derivative;
(B) halogenating the hydroxyl group of the allyl alcohol derivative to convert it to form an allyl halide derivative;
(C) allowing the allyl halide derivative to react with a polyisoprenyl sulfone derivative to form a sulfonated polyprenol derivative; and
(D) subjecting the sulfonated polyprenol derivative to desulfonylation to obtain the all trans-form polyprenol.
通过以下方法可以得到全反式多酚;
(A) 将 3,7-二甲基-6-羟基-7-辛烯-1-醇衍生物进行五碳延长反应 m 次,包括与 2-甲基-3,3-二甲氧基-1-丁烯反应,并还原所得化合物的羰基,以获得烯丙醇衍生物;
(B) 卤化烯丙醇衍生物的羟基,将其转化为烯丙基卤化物衍生物;
(C) 让烯丙基卤化物衍生物与聚异戊烯基砜衍生物反应,形成磺化聚丙 烯醇衍生物;以及
(D) 将磺化聚丙稀酚衍生物进行脱磺化反应,得到全反式聚丙稀酚。