The Knoevenagel adducts of 2-aroyl-3,3-bis(alkylsulfanyl)acrylaldehydes and malononitrile were cyclized in the presence of diisopropylamine to afford 5-aroyl-2,6-bis(methylsulfanyl)nicotinonitriles. Cyclization in the presence of aqueous ammonia gave 2-amino-5-aroyl-6-(methylsulfanyl) nicotinonitriles. A multicomponent reaction involving aroylketene dithioacetals, malononitrile and Vilsmeier reagent gave 5-aroyl-2-chloro-6-(methylsulfanyl)nicotinonitrile.
2-aroyl-3,3-bis(alkylsulfanyl)acryaldehydes 和
丙二腈的 Knoevenagel 加合物在
二异丙基胺存在下发生环化反应,生成 5-aroyl-2,6-bis(methylsulfanyl)nicotinonitriles。在
氨水存在下进行环化,可得到 2-
氨基-5-芳酰基-6-(甲
硫基)
烟腈。在涉及芳基
乙烯二硫代乙酸酯、
丙二腈和 Vilsmeier 试剂的多组分反应中,生成了 5-芳酰基-2-
氯-6-(甲
硫基)
烟腈。