gave respective 2-amino-N-arylbenzamidines. 4-Arylaminoquinazolines lacking a substituent at the 2 position were obtained directly by heating 2-amino-N-arylbenzamidines in formic acid; in similar conditions other carboxylic acids did not react with the amidines. The latter when treated with aldehydes afforded 2-aryl-4-arylimino-1H-2,3-dihydroquinazolines readily oxidizable by potassium permanganate to
在
氯化铝存在下用
苯胺处理的2-
氨基
苄腈分别得到2-
氨基-N-芳基苯甲m。通过在
甲酸中加热2-
氨基-N-芳基苯甲m直接获得在2位上没有取代基的4-芳基
氨基
喹唑啉;在类似条件下,其他
羧酸不与the反应。当用醛处理时,后者得到2-芳基-4-芳基
氨基-1 H -2,3-二氢
喹唑啉易于被
高锰酸钾氧化成2-芳基-4-芳基
氨基
喹唑啉。