申请人:Roche Vitamins Inc.
公开号:US06201155B1
公开(公告)日:2001-03-13
A process for the manufacture of a symmetrical, terminally ring-substituted polyenes by reacting a polyene di(O,O-dialkyl acetal) with a cyclic dienol ether in the presence of a Lewis or Brönsted acid, hydrolyzing the condensation product resulting therefrom and cleaving off alcohol under basic or acidic conditions from the polyene derivative produced at this stage. The novel cyclic dienol ethers, as well as, novel intermediates resulting from the condensation and additional intermediates in this process form further aspects of the invention. The final products are primarily carotenoids, which find corresponding use, e.g., as colorings and pigments for foodstuffs, animal products, etc.
一种制备对称的、末端环替代聚烯烃的工艺,通过将聚烯烃二(O,O-二烷基缩醛)与环式双烯醇醚在Lewis酸或Brönsted酸存在下反应,水解所得的缩聚产物,并在此阶段从所产生的聚烯烃衍生物中在碱性或酸性条件下裂解醇。新颖的环式双烯醇醚,以及在此过程中形成的新颖中间体,进一步构成了该发明的方面。最终产品主要是类胡萝卜素,可用于食品、动物产品等领域,如色素和颜料。