A practical protocol for the preparation of (5Z)-2-alkylthio-5-arylmethylene-1-methyl-1,5-dihydro-4H-imidazol-4-one derivatives is reported. The new compounds were obtained in good yield and stereoselectivity in two steps, namely a solvent-free Knoevenagel condensation under microwave irradiation, followed by an S-alkylation reaction with various halogenoalkanes.
报道了一种制备(5Z)-2-烷基
硫-5-芳基亚甲基-1-甲基-1,5-二氢-
4H-咪唑-4-酮衍
生物的实用方案。新的化合物在良好的产率和立体选择性下通过两步反应获得,即在微波辐射下进行无溶剂Knoevenagel缩合,随后与各种卤烷进行S-烷基化反应。