申请人:Hoffmann-La Roche Inc.
公开号:US05227507A1
公开(公告)日:1993-07-13
A process for the manufacture of compounds of the general formula ##STR1## wherein R.sup.1 signifies hydroxy or an etherified hydroxy group, and of zeaxanthin by converting a compound of the general formula ##STR2## wherein R.sup.1 has the above significance, in an inert organic solvent into the acetylenide and reacting this with methyl vinyl ketone, reducing the alcoholate obtained or the alcohol (obtained after hydrolysis of the alcoholate) of the general formula ##STR3## wherein R.sup.1 has the above significance, in an inert organic solvent with an aluminum hydride of the general formula R.sub.x MAlH.sub.4-x III wherein M signifies alkali metal, R represents C.sub.1 -C.sub.10 -alkoxy or a group of the formula C.sub.n H.sub.2n+1 --O--C.sub.m H.sub.2m --O--, m and n each individually denote whole numbers of 1 to 7 and x stands for 0, 1, 2 or 3, and subsequently hydrolyzing to give the compound of formula IV and, if desired, converting the compound of formula IV obtained into zeaxanthin.
一种制备一般式为##STR1##其中R1表示羟基或醚化羟基基团的化合物,以及通过将一般式为##STR2##其中R1具有上述意义的化合物在惰性有机溶剂中转化为乙炔基,并与甲基乙烯酮反应,还原所得的醇盐或一般式为##STR3##其中R1具有上述意义的醇(在醇盐水解后获得),在惰性有机溶剂中与一般式为RxMAlH4-x III的铝氢化物反应,其中M表示碱金属,R表示C1-C10-烷氧基或CnH2n + 1-O-CmH2m-O-的基团,m和n各自表示1至7的整数,x表示0,1,2或3,然后水解得到公式IV的化合物,如果需要,将公式IV的化合物转化为玉米黄质。