Improvements in the synthesis of urazoles via a proposed transcarbamylation reaction are reported. Some experimental evidence for a transcarbamylation mechanism as indicated by the formation of identified intermediate products is shown. 13C n.m.r. studies on 1-phenyl-4-anilinourazole have settled the controversy on the structure of Pinner's compounds by establishing that they are 1,2,4-triazoles rather
报道了通过提议的
氨基甲酰化反应合成
尿唑的改进。显示了由确定的中间产物的形成表明的
氨基甲酰转移机制的一些实验证据。13C nmr 对 1-苯基-4-
苯胺基
脲唑的研究通过确定它们是
1,2,4-三唑而不是 sym-四嗪,解决了关于 Pinner 化合物结构的争议。