Technical Procedures for the Syntheses of Carotenoids and Related Compounds from 6-Oxo-isophorone: Syntheses of (3R,3?R)-Zeaxanthin. Part I
作者:Erich Widmer、Milan Soukup、Reinhard Zell、Emil Broger、Hans Peter Wagner、Marquard Imfeld
DOI:10.1002/hlca.19900730411
日期:1990.6.20
Starting from the readily available, optically active (4R)-4-hydroxy-2,2,6-trimethylcyclohexanone (1), a new technical synthesis of (3R,3′R)-zeaxanthin is described. According to a 2(C9 + C6) + C10 = C40 construction scheme, the ketone 1 was first transformed with (E)-3-methylpent-2-en-4-yn-1-ol (5) into a C15-intermediate which, by a three-step sequence, could be converted into the known olefinic
从容易获得的,光学活性的(4开始- [R)-4-羟基-2,2,6-三甲基(1),(3的新技术合成- [R,3' - [R -zeaxanthin)进行说明。根据2(C 9 + C 6)+ C 10 = C 40的构建方案,首先将酮1用(E)-3-甲基戊-2-en-4-yn-1-ol(5)转化为一个C 15 -中间,其通过一个三步骤顺序,可以被转化成已知的烯烃ç 15 -维蒂希盐4。优化的最终条件讨论了4与C 10-二醛3的维蒂希反应。基于1,整个技术过程的总产量约为。40%。