Stereoselective construction of conjugated trienoic acids was achieved through two successive Stille reactions, coupling as the first step (E)-1,2-bis(tributylstannyl)ethylene and tributylstannyl-3-iodoalk-2-enoates. The second step can be conducted by two different routes: 1) cross-coupling of vinyltin reagents and tributylstannyl 5-iodopenta-2,4-dienoates generated by iododestannylation of stannyldienes 2.
通过两步连续的Stille反应实现了对合成共轭
三烯酸的立体选择性构建,第一步为偶联反应,使用(E)-1,2-双(三正
丁基锡)
乙烯和三正
丁基锡-3-
碘烯2-酸酯。第二步可以通过两种不同的途径进行:1) 将烯基
锡试剂与通过对
锡烯烃2进行
碘去
锡反应生成的三正
丁基锡-5-
碘戊-2,4-烯酸酯进行交叉偶联反应。