Synthesis and intramolecular cyclization of 2-methylsulfany-4-oxo-3(4<i>H</i>)-quinazolinyl)acetohydrazide
作者:Milda M. Burbuliene、Olegas Bobrovas、Povilas Vainilavicius
DOI:10.1002/jhet.5570430106
日期:2006.1
inone with methyl bromoacetate resulted in N(3)-alkyl ester formation. Reaction of the resulted ester with hydrazine hydrate gave 2-methylsulfanyl-4-oxo-3(4H)-quinazolinyl)acetohydrazide, which underwent intramolecular cyclization under heating in dimethylformamide to give 1-aminoimidazo[2,1-b]quinazoline-2,5(1H,3H)-dione. The latter took place in acylation reaction and in condensation with aromatic
用溴乙酸甲酯处理2-甲基硫烷基-4(3 H)-喹唑啉酮的环境钠盐导致形成N (3) -烷基酯。所得酯与水合肼反应,得到2-甲基硫烷基-4-氧代-3(4H)-喹唑啉基)乙酰肼,将其在二甲基甲酰胺中加热下进行分子内环化,得到1-氨基咪唑并[ 2,1- b ]喹唑啉-2。 ,5(1 H,3 H)-二酮。后者在酰化反应中和与芳族醛的缩合中进行。