5-(3-苯基硫脲基)-3H-咪唑-4-甲酰胺与卤代烷和氯丙酮的连续烷基化得到(N-氧代丙基咪唑基)异硫脲,其很容易转化为嘌呤和咪唑并吡嗪酮的衍生物。在 5-(3-苯基硫脲基)-3H-咪唑-4-羧酸乙酯的情况下,初级烷基化发生在咪唑环的 N 原子上。5-(3-苯基硫脲基)-3H-咪唑-4-甲酰胺与卤代酮反应得到许多4-羟基-2-咪唑基亚胺噻唑烷和2-咪唑基亚氨基-Δ4-噻唑啉。
The reaction of ethyl 5-phenylthioureido-3H-imidazole-4-carboxylate with bromoacetic acid afforded (imidazolylimino)thiazolidinones, which were transformed into the corresponding 5-arylidene-4-thiazolidinones by the reactions with aldehydes. Under the conditions of the Knoevenagel reaction, the thiazolidine ring in derivatives of 4-(4-oxothiazolidin-2-ylidene-amino)-3H-imidazole-4-carboxamides was opened to form substituted guanidines.