The synthesis of the titled C18 apocarotenoid prohormone by means of palladium-catalyzed cross-coupling reaction between (E)-1-alkenylbis(1,2-dimethylpropyl)-borane (10) and (Z)-6-iodo-5-hepten-2-one ethylene acetal (9) is described. The reaction is highly stereoselective and the demanded (7E) and (9Z) double bonds are readily introduced.
本研究描述了通过
钯催化(E)-1-
烯基双(1,2-二
甲基丙基)-
硼烷(10)和(Z)-6-
碘-5-庚
烯-2-
酮乙烯缩醛(9)之间的交叉偶联反应合成标题为 C18 的类
胡萝卜素原激素的过程。该反应具有高度的立体选择性,并且很容易引入所需的 (7E) 和 (9Z) 双键。