Synthesis of 1-hydrazinopyridazino[4,5-<i>b</i>]quinoxaline and related compounds
作者:A. Onge Vega、M. J. Gil、E. Fernández-Alvarez
DOI:10.1002/jhet.5570210505
日期:1984.9
3-b]pyridazino[4,5-b]quinoxalines 13 were obtained. Compound 13a was also obtained in the reaction of 10 with benzoyl chloride. Reaction of 3 with phenylhydrazine gave 1,2-dihydro-1-oxo-2-phenylpyridazino[4,5-b]quinoxaline (6). Reactions of 5 with acetic anhydride and dimethylsulfate gave, respectively, 1-acetoxypyridazino[4,5-b]quinoxaline (8) and 1,2-dihydro-1-oxo-2-methylpyridazino-[4,5-b]quinoxaline (7). All
本文描述了1-肼基吡啶并[4,5- b ]喹喔啉(10),四唑并[4,3- b ]吡啶并[4,5- b ]喹喔啉(11)和一些1,2,4-三唑并氮杂的合成。 [4,3- b ]吡啶并[4,5- b ]喹喔啉13。以2-乙氧基羰基-3-甲基喹喔啉1,4-二氧化物(1)为起始原料,通过三种不同的方法制备1,2-二氢-1-氧杂哒嗪[4,5- b ]喹喔啉(5):在乙酸中的1生成2-乙氧基羰基-3-二氯甲基喹喔啉1,4-二氧化物,与过量的肼反应生成约60%的5; (b)用二氧化硒氧化1得到90%的2-乙氧基羰基-3-甲酰基喹喔啉1,4-二氧化物(3),其与肼反应得到5(63%);(c)用肼处理化合物3,得到1,2-二氢-1-氧并吡啶并-[4,5- b ]喹喔啉1,4-二氧化物(4)(70%),通过连二亚硫酸钠还原得到5(80%)。化合物5与五硫化二磷或Lawesson试剂反应,得到1,2-二氢-1-硫代羰基吡啶并[4