Thiuronium salts in the synthesis of thiazole derivatives. Synthesis of benzimidazolylthiazoles. Molecular and crystal structure of 2-acetylamino-5-(2-benzimidazolyl)-4-methylthiazole

5-(2-Benzimidazolyl)thiazoles were obtained by the reaction of benzimidazolylmethylthiuronium salts with carboxylic acid anhydrides. The three-dimensional structure of 2-acetylamino-5-(2-benzimidazolyl)-4-methylthiazole monohydrate was investigated by x-ray diffraction analysis (XDA).Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1063–1067, August, 1992.