A rearrangement of O,O-silylketene acetals leading to γ-thiomethylation of butenoic acid derivatives
作者:Libuse Jaroskova、Manuel Bourgaux、Isabelle Wenkin、Leon Ghosez
DOI:10.1016/s0040-4039(98)00508-5
日期:1998.5
Methylthiomethyl esters of α,β-unsaturated acids 2 were converted into the corresponding ketene acetals 3 by O-silylation. Ketene acetals rearranged in refluxing toluene to give, after methanolysis, the corresponding γ-methylthiomethyl substituted methyl esters 4. In the case of phenylthiomethylesters the products of α-substitution were observed.
α,β-不饱和酸2的甲硫基甲基酯通过O-甲硅烷基化转化为相应的乙烯酮缩醛3。乙缩醛在回流的甲苯中重排,甲醇分解后得到相应的γ-甲硫基甲基取代的甲基酯4。在苯硫基甲基酯的情况下,观察到α-取代的产物。