α-Methylthio-α,β-unsaturated sulfones 3 prepared from aromatic aldehydes 1 and sulfone 2 react with sodium hydrogen telluride in ethanol to undergo reductive desulfonylation to give vinyl sulfides 4 with certain extent of stereospecificity. A new route to one carbon homologation of aromatic aldehydes 1 to 5 is achieved by hydrolysis of 4 with titanium tetrachloride.
由芳香醛 1 和砜 2 制备的δ-甲
硫基-δ,δ-不饱和砜 3 与
碲化氢钠在
乙醇中发生还原性脱磺反应,生成具有一定立体特异性的
乙烯基砜 4。芳香醛 1 至 5 的单碳同源化新途径是通过 4 与
四氯化钛的
水解来实现的。