申请人:ROCHE VITAMINS, INC.
公开号:US20010018544A1
公开(公告)日:2001-08-30
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.
一种制造对称、端基环替代聚烯烃的方法,通过在路易斯酸或布朗斯特德酸的存在下,将聚烯烃二(O,O-二烷基缩醛)与环状二烯醇醚反应,水解所得到的缩合产物,并在碱性或酸性条件下从此阶段产生的聚烯烃衍生物中剥离醇。新颖的环状二烯醇醚以及由缩合产物和该过程中的其他中间体产生的新颖中间体,形成了该发明的进一步方面。最终产品主要是类胡萝卜素,可以相应地用作食品、动物产品等的着色剂和颜料。