Synthetic Study of Piericidins. I. Synthesis of the Side Chain of Piericidin B1.
作者:Machiko ONO、Norio YOSHIDA、Yuki KOKUBU、Eiji SATO、Hiroyuki AKITA
DOI:10.1248/cpb.45.1428
日期:——
The side chain of piericidin B1 having four (E)-olefinic linkages was prepared. The coupling reaction of the non-conjugated aldehyde (22) derived from 4, 4-dimethoxy-2-butanone and the sulfone (13) afforded a diastereomeric mixture of the hydroxy sulfone (27). Benzoylation of 27 followed by reductive olefin formation with sodium amalgam gave the desired all-trans-tetraene (29) possessing an (E)-C(5)-C(6) double bond, which was transformed to the alcohol (1) corresponding to the side chain of piericidin B1.
制备出了具有四个 (E)- 烯烃连接的 piericidin B1 侧链。由 4,4-二甲氧基-2-丁酮衍生的非共轭醛(22)与砜(13)发生偶联反应,得到羟基砜(27)的非对映混合物。对 27 进行苯甲酰化,然后用钠汞齐进行还原烯烃形成反应,得到了所需的全反式四烯(29),它具有 (E)-C(5)-C(6) 双键,并转化为与 piericidin B1 侧链相对应的醇 (1)。