申请人:BASF Aktiengesellschaft
公开号:US04233464A1
公开(公告)日:1980-11-11
1-[3-Methyl-3,5,5-trialkoxy-pent-1-yn-1-yl]-2,6-dimethyl-cyclohex-1-enes, which may or may not be methyl-substituted in the 2- and/or 6-position, are obtained by reacting the corresponding 1-[3-methyl-but-1-yn-3-en-1-yl]-2,6-dimethyl-cyclohex-1-enes with orthoformic acid esters in the presence of acid condensing agents. The new compounds provide a new method of access to the compounds of carotinoid chemistry, especially to vitamin A, which avoids the conventional expensive synthesis via phosphorus ylide compounds.
通过在酸缩合剂存在的情况下,将相应的1-[3-甲基-丁-1-炔-3-烯-1-基]-2,6-二甲基环己-1-烯与正甲酸酯反应,可以获得1-[3-甲基-3,5,5-三烷氧基-戊-1-炔-1-基]-2,6-二甲基环己-1-烯,该化合物可能或可能不在2-和/或6-位置上被甲基取代。这些新化合物提供了一种新的方法,可访问类胡萝卜素化学中的化合物,特别是维生素A,避免了通过磷叶基化合物的传统昂贵合成。