Cycloaddition Reactions of 2-Acetylamino-, 2-Alkylamino-, 8-Ethylamino-, and 8-Acetylamino-1-azaazulenes with Dimethyl Acetylenedicarboxylate
作者:Noritaka Abe、Yoshimasa Fukazawa、Yoshimasa Hirai、Tosio Sakurai、Kunio Urushido、Akikazu Kakehi
DOI:10.1246/bcsj.65.1784
日期:1992.7
amino)-1-azaazulenes with dimethyl acetylenedicarboxylate (DMAD) were investigated. Treatment of ethyl 2-acetylamino-1-azaazulene-3-carboxylate with DMAD in refluxing acetonitrile gave 9-ethyl 1,2,3-trimethyl 3a-azacyclopent[a]azulene-1,2,3,9-tetracarboxylate, 5-ethyl 1,2,2a,3-tetramethyl 4-acetyl-2a,3-dihydro-4H-4, 10b-diazapentaleno[1,6-aj]azulene-1,2,2a,3,5-pentacarboxylate (3a), and dimethyl (10-ethoxycar
研究了 2-和 8-(取代氨基)-1-氮杂氮杂与乙炔二羧酸二甲酯 (DMAD) 的反应。在回流乙腈中用 DMAD 处理 2-乙酰氨基-1-氮杂环戊烯-3-羧酸乙酯,得到 1,2,3-三甲基 3a-氮杂环戊 [a] 氮杂环戊烷-1,2,3,9-四羧酸 9-乙酯,5- 1,2,2a,3-四甲基 4-乙酰基-2a,3-dihydro-4H-4, 10b-diazapentaleno[1,6-aj]azulene-1,2,2a,3,5-pentacarboxylate (3a)和(10-乙氧基羰基-4-甲氧基羰基-2,4a-二氢-2-氧代-2H-1,4a-二氮杂苯并[a]azlen-3-基)马来酸二甲酯。化合物3a热重排为9-乙基2,3,10,11-四甲基1-乙酰-2,3,4,4a-四氢-1H-1,4-二氮杂-3,4a-乙烯芴-2,3,9 ,10,11-五羧酸盐。2-烷基氨基-1-氮杂氮杂-3-羧