Diazotized anathranilic acid and its methyl ester react with substituted α-thiocyanatoacetoacetanilides3a–c to give in both cases the corresponding thiadiazolo [2,3-b] quinazolines6a–c, respectively. A mechanism is proposed and it is substantiated by synthesis of6a from N-(2-car☐yphenyl)-C-phenylcarbamoyl hydrazidoyl chloride8a or its N-(2-methoxycarbonylcarbonylphenyl) analogue8d.
重氮化的
邻氨基苯甲酸及其甲酯与取代的α-
硫氰酸根乙酰
乙酰苯胺3a-c反应,在两种情况下分别给出相应的
噻二唑并[2,3 - b ]
喹唑啉6a-c。提出了一种机理,并通过由N-(2-car☐yphenyl)-C-苯基
氨基甲酰基
肼基
十二烷基
氯8a或其N-(2-甲氧基羰基羰基苯基)类似物8d合成6a来证实其机理。