Unsaturated bicyclic lactones are readily prepared by converting cyclic allylic alcohols to the corresponding α-chloromercurio acetate esters and reacting them with Li2PdCl4. The corresponding acetals can be synthesized directly by reaction of the allylic alcohols with ethyl vinyl ether and Pd(OAc)2.
通过将环状烯丙基醇转化为相应的α-
氯汞乙酸酯并使它们与Li 2 PdCl 4反应,可以很容易地制备不饱和的双环内酯。相应的
缩醛可以通过烯丙基醇与乙基
乙烯基醚和Pd(OAc)2的反应直接合成。