carbonate 1 furnished the β-formyl esters 3a/b in 68% yield, while the Z-vinylogous sulfonate (Z-VINS) 2 under analogous reaction conditions led to reversible O-alkylation and isomerization to afford the E-VINS 4a/b in 61% yield. This observation prompted the development of the vinylogous sulfonate as an improved leaving group for a variety of palladium-catalyzed allylic substitution reactions.
标有
氘的
钯催化的重排插烯
碳酸酯1提供的β-甲酰基酯3A / B在68%的产率,而ž -vinylogous
磺酸盐(Ž -VINS)2导致可逆类似的反应条件下ö烷基化和异构化,以以61%的收率得到E -VINS 4a / b。该观察结果促进了
乙烯基磺酸盐作为各种
钯催化的烯丙基取代反应的改进的离去基团的发展。