Heterocyclic compounds from urea derivatives. Part XVII. Reactions of 1-phenylcarbonohydrazide and 1-phenylthiocarbonohydrazide with carbodi-imides
作者:Frederick Kurzer、Michael Wilkinson
DOI:10.1039/j39700000026
日期:——
Equimolar quantities of 1-phenylcarbonohydrazide and diarylcarbodi-imides react additively in dimethylformamide, giving good yields of 1-NN′-diarylamidino-5-phenylcarbonohydrazides. These are readily cyclised by aqueous alkali to 4-anilino-3-arylamino-1,2,4-triazolin-5-ones, with loss of arylamine. Thermolysis effects the same cyclisation, but produces additionally (and sometimes exclusively) 4-aryl-3-arylamino-1
1-phenylcarbonohydrazide的等摩尔量和diarylcarbodi酰亚胺相加反应在二甲基甲酰胺,得到1-良好的产率NN '-diarylamidino -5- phenylcarbonohydrazides。这些可以容易地通过碱水溶液环化成4-苯胺基-3-芳基氨基-1,2,4-三唑啉-5-酮,而失去芳基胺。热解实现相同的环化,但是额外地(有时仅)产生4-芳基-3-芳基氨基-1,2,4-三唑啉-5-酮,并且消除了苯肼。