Synthesis and some reactions of 1,2-diamino-1,3-diaza- and 1,2-diamino-1-azaazulenium salts
作者:Noritaka Abe、Kunihiko Odagiri、Miki Otani、Etsuko Fujinaga、Hiroyuki Fujii、Akikazu Kakehi
DOI:10.1039/a900688e
日期:——
Amination of azaazulenes 1–3 with O-mesitylsulfonylhydroxylamine occurs at N-1 and gives the corresponding azaazulenium salts 4–6. The treatment of the salts 4 and 6 with potassium carbonate gives 1-amino-2-imino-1,2-dihydro-1,3-diaza- and 1-azaazulenes. The structure of 1-amino-2-ethylimino-1,2-dihydro-1-azaazulene (10) was characterized by X-ray crystal structure analysis. Reaction of the salt 4 with acetic anhydride gave 2-methyl-1,3,3a,9-tetraazacyclopent[a]azulene. The reaction of the salts 4 and 5 with diethyl ethoxymethylenedicarboxylate (DEEM) in the presence of potassium carbonate in acetonitrile gave 1,3,3a,9-tetraaza- (19) and 1,3,3a-triazacyclopent[a]azulene derivatives (21) as major products, whereas the reaction in ethanol gave 1,2a,3-triaza- (17) and 2a,3-diazabenz[cd]azulene derivatives (22), respectively. Similar treatment of 6 with DEEM gave diethyl (2-ethylimino-1,2-dihydro-1-azaazulen-1-yl)aminomethylenemalonate 23, which converted to 2a,3-diazabenz[cd]azulene derivative (24). The salts 4–6 reacted with active methylene compounds such as diethyl acetonedicarboxylate, diethyl oxalacetate and ethyl pyruvate, at the N-amino group followed by a cyclization at the C-8 position on the azaazulene ring to give 1,2a,3-triaza- (25, 28, 29) and 2a,3-diazabenz[cd]azulene derivatives (26, 27, 30). Cycloaddition of the salts 4–6 with acetylenic esters in the presence of potassium carbonate proceeded regioselectively and gave 1,2a,3-triaza- (32–35) or 2a,3-diazabenz[cd]azulene derivatives (31, 36, 37, 39–41).
氮杂薁烯 1-3 在 N-1 处与 O-异三甲苯磺酰羟胺发生胺化,得到相应的氮杂薁鎓盐 4-6。用碳酸钾处理盐4和6得到1-氨基-2-亚氨基-1,2-二氢-1,3-二氮杂-和1-氮杂薁蓝烯。通过X射线晶体结构分析对1-氨基-2-乙基亚氨基-1,2-二氢-1-氮杂薁(10)的结构进行了表征。盐4与乙酸酐反应得到2-甲基-1,3,3a,9-四氮杂环戊[a]薁。盐4和5与乙氧基亚甲基二甲酸二乙酯(DEEM)在碳酸钾存在下在乙腈中反应得到1,3,3a,9-四氮杂-(19)和1,3,3a-三氮杂环五[a]薁衍生物( 21)作为主要产物,而在乙醇中的反应分别产生1,2a,3-三氮杂-(17)和2a,3-二氮杂苯并[cd]甘菊环衍生物(22)。用DEEM对6进行类似处理,得到(2-乙基亚氨基-1,2-二氢-1-氮杂薁-1-基)氨基亚甲基丙二酸二乙酯23,其转化为2a,3-二氮杂苯并[cd]甘菊环衍生物(24)。盐4-6与活性亚甲基化合物如丙酮二甲酸二乙酯、草乙酸二乙酯和丙酮酸乙酯在N-氨基上反应,然后在氮杂薁环上的C-8位上环化,得到1,2a,3-三氮杂-(25、28、29)和2a,3-二氮杂苯并[cd]甘菊环衍生物(26、27、30)。盐 4-6 与炔酯在碳酸钾存在下进行区域选择性环加成,得到 1,2a,3-三氮杂- (32-35) 或 2a,3-二氮杂苯并[cd]甘菊环衍生物 (31, 36, 37 ,39-41)。