Substitution Reaction of Ketene Dithioacetals with Carbon Electrophiles by the Promotion of Trityl Chloride-Tin(II) Chloride or Trimethylsilyl Chloride-Tin(II) Chloride Catalyst System
In the presence of catalytic amounts of trityl chloride or trimethylsilyl chloride and tin(II) chloride, ketene dithioacetals smoothly react with allyl methyl ethers or α,β-unsaturated orthoesters to afford the corresponding allyl or alkoxycarbonylethyl substituted ketene dithioacetals in good yields.
在催化量的三苯甲基氯或三甲基甲硅烷基氯和氯化锡 (II) 存在下,乙烯酮二硫代缩醛与烯丙基甲基醚或 α,β-不饱和原酸酯顺利反应,以良好的收率提供相应的烯丙基或烷氧羰基乙基取代的乙烯酮二硫缩醛。