Bidirectional Hiyama–Denmark Cross‐Coupling Reactions of Bissilyldeca‐1,3,5,7,9‐pentaenes for the Synthesis of Symmetrical and Non‐Symmetrical Carotenoids
作者:Aurea Rivas、Víctor Pérez‐Revenga、Rosana Alvarez、Angel R. Lera
DOI:10.1002/chem.201903080
日期:2019.11.13
construction of the carotenoid skeleton by Pd-catalyzed Csp2 -Csp2 cross-coupling reactions of symmetrical and non-symmetrical 1,10-bissilyldeca-1,3,5,7,9-pentaenes and the corresponding complementary alkenyl iodides has been developed. Reaction conditions for these bidirectional and orthogonal Hiyama-Denmark cross-coupling reactions of bisfunctionalized pentaenes are mild and the carotenoid products preserve
已经开发了通过对称和不对称的1,10-双甲硅烷基癸基-1,3,5,7,9-戊烯与相应的互补烯基碘化物的Pd催化的Csp2-Csp2交叉偶联反应来构建类胡萝卜素骨架的方法。双官能化五烯的这些双向和正交的Hiyama-Denmark交叉偶联反应的反应条件温和,并且类胡萝卜素产物保留了相应的低聚配偶体的立体化学信息。以这种方式合成的类胡萝卜素包括β,β-胡萝卜素和(3R,3'R)-玉米黄质(对称)以及9-顺-β,β-胡萝卜素,7,8-二氢-β,β-胡萝卜素和β-隐黄质(非对称)。