Ring-opening allylation of cyclic acetals has required stoichiometric amounts of Lewis acids. In this paper, catalytic ring-opening allylation in the presence of silica-alumina is reported. This ring-opening allylation showed high atom economy. Consecutive allylation/hydrolysis using silica-alumina afforded homoallyloxyalcohols in good to high yields.
环状
缩醛的开环烯基化反应需要使用计量量的
路易斯酸。本文报道了在
硅铝土的存在下进行催化的开环烯基化反应。该开环烯基化反应显示出高原子经济性。使用
硅铝土进行连续的烯基化/
水解反应能够以良至高的产率合成同烯基醇。