NOVEL METHODS FOR THE SYNTHESIS OF SOME PYRIDAZINO-, FURO-, AND POLYSUBSTITUTED PYRIDAZINES
作者:Alyaa A. Shalaby、Manal M. El-Shahawi、Nabil A. Shams、Suzan Batterjee
DOI:10.1081/scc-120003146
日期:2002.1
6-diphenylpyridazine 1 reacted with hydrazine hydrate to form tetrahydropyridazino [4,5-c]pyridazine 2, which reacted with ethyl bromoacetate to give 6,7-diethoxycarbonylmethyl-3,4-diphenyl-5,8-dioxopyridazino [4,5-c]pyridazine 3. However, acetylation of 2 with acetyl chloride gave three different pyridazino[4,5-c]pyridazines 4–6. The reaction of the starting diester 1 with different amounts of phenylmagnesium
摘要 3,4-二乙氧基羰基-5,6-二苯基哒嗪 1 与水合肼反应生成四氢哒嗪 [4,5-c]哒嗪 2,后者与溴乙酸乙酯反应生成 6,7-二乙氧基羰基甲基-3,4-二苯基-5 ,8-二氧哒嗪并 [4,5-c] 哒嗪 3。然而,2 与乙酰氯的乙酰化得到三种不同的哒嗪并 [4,5-c] 哒嗪 4-6。起始二酯 1 与不同量的苯基溴化镁反应得到不同的产物 7-10。通过碱水解和肼解阐明产物8的结构,分别得到11和13。在哌啶中用苯甲醛处理 13 得到起始格氏产物 8 和苯扎嗪 17。