Isothiocyanates. I. Addition of Urea to Aroyl Isothiocyanates and Conversion of the Monoadducts into Monothiobiuret, 4-Thioxo-1,3,5-triazin-2-ones and 1,2,4-Thiadiazol-3-ones
作者:Mohamed Nabih Basyouni、Abdel-Momen El-Khamry
DOI:10.1246/bcsj.52.3728
日期:1979.12
The hitherto unknown 1-aroyl-2-thiobiurets were synthesized by addition of urea to aroyl isothiocyanates. Treatment of 1-benzoyl-2-thiobiuret with concentrated hydrochloric acid effected hydrolysis to monothiobiuret. On the other hand, treatment of 1-aroyl-2-thiobiurets with alkali gave 6-aryl-4-thioxo-1,2,3,4(or 2,3,4,5)-tetrahydro-1,3,5-triazin-2-ones. Oxidation of the 1-aroyl-2-thiobiurets with
迄今为止未知的 1-aroyl-2-thiobiuret 是通过将尿素添加到芳酰基异硫氰酸酯中来合成的。用浓盐酸处理 1-苯甲酰基-2-硫代缩二脲可水解为单硫代缩二脲。另一方面,用碱处理 1-aroyl-2-thiobiurets 得到 6-aryl-4-thioxo-1,2,3,4(或 2,3,4,5)-tetrahydro-1,3,5 -triazin-2-ones。在盐酸存在下用过氧化氢氧化 1-aroyl-2-thiobiurets 得到 5-aroylamino-2.3-dihydro-1,2,4-thiadiazol-3-ones。