Synthesis and reactions of 3-amino-2-methyl-3<i>H</i>-[1,2,4]triazolo[5,1-<i>b</i>]-quinazolin-9-one and 2-hydrazino-3-phenylamino-3<i>H</i>-quinazolin-4-one
作者:Mohamed A. Saleh、Yehia A. Hafez、Foad E. Abdel-Hay、Wagdy I. Gad
DOI:10.1002/jhet.5570400604
日期:2003.11
reduction by SnCl2 and HCl gave the hydrazino derivative 6. Reaction of 2 with phenyl isothiocyanate in refluxing ethanol yielded thiourea derivative 7. Ring closure of 7 subsequently cyclized on refluxing with phencyl bromide, oxalyl dichloride and chloroacetic acid afforded the corresponding thiazolidine derivatives 8, 9 and 10, respectively. Reaction of 2-mercapto-3-phenylamino-3H-quinazolin-4-one (11)
的3-反应ñ - (2-巯基-4-氧代-4- ħ -喹唑啉-3-基)乙酰胺(1水合肼),得到3-氨基-2-甲基-3- ħ - [1,2,4 ]三唑并[5,1- b ]喹唑啉-9-一(2)。的反应2与ö氯苯甲醛和2-羟基萘甲醛,得到相应的3-氨基亚芳基衍生物3和4,分别。2与1-亚硝基-2-萘酚的缩合得到相应的3-(2-羟基-萘-1-基-二氮烯基)-2-甲基-3 H- [1,2,4]三唑[5,1- b ]喹唑啉-9-一(5),其上通过的SnCl随后的还原2和HCl,得到肼衍生物6.反应2与异硫氰酸苯酯在回流的乙醇中,得到硫脲衍生物7的环闭合7随后与phencyl溴,草酰二氯和氯乙酸得到环化回流相应的噻唑烷衍生物8、9和10。2-巯基-3-苯基氨基- 3的反应ħ -喹唑啉-4-酮(11与肼水合物),得到2-肼基-3-苯氨基3 ħ -喹唑啉-4-酮(12)。反应性12对于二硫化碳,乙酰丙酮和乙酰