The α-hydroxyketene dithioacetals 2 and 5, obtained from α-oxoketene dithioacetals by the 1,2-reduction or the 1,2-addition of carbon nucleophiles, on treatment with Lawesson's reagent afforded α,β-unsaturated dithioesters 3 and 6 in good yields.
α-羟基
烯酮二硫代缩醛 2 和 5,由 α-氧代烯二
硫代
缩醛通过碳亲核试剂的 1,2-还原或 1,2-加成获得,用 Lawesson 试剂处理得到 α,β-不饱和二
硫代酯 3 和 6产量。