An efficient desymmetrization of diols is achieved using phosphonium salts which undergo deprotonation in the presence of a hindered amine base and manganese dioxide to produce α,β-unsaturated hydroxy esters in good yields.
利用膦盐在位阻胺碱和
二氧化锰存在下发生脱质子作用,可以高效地实现二元醇的非对称化,从而以良好的产率制得α,β-不饱和羟基酯。