Studies on heterocyclic analogs of azulenes. XI. Syntheses and cycloadditions of cyclohepta(4,5)pyrrolo(1,2-a)imidazoles and cyclohept(d)imidazo(1,2-a)imidazoles.
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概要
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Cyclohepta[4,5]pyrrolo[1,2-<I>a</I>]imidazoles (1,3a-diazacyclopent[<I>a</I>]azulenes) (<B>2</B>) and cyclohept[<I>d</I>]imidazo[1,2-<I>a</I>]imidazoles (1,3a,9-triazacyclopent[<I>a</I>]azulenes) (<B>6</B>) were synthesized from 2-aminocyclohepta[<I>b</I>]pyrroles and 2-aminocycloheptimidazole, respectively, in moderate to good yields. Reactions of <B>2</B> and <B>6</B> with reactive acetylenes gave 2-azacyclohepta[<I>ef</I>]cycl[3.2.2]azines together with bis(1,3<B>a</B>-diazacyclopent[<I>a</I>]azuleno)[1,7]diaza[12]annulenes (<B>4</B>) and 2,3-diazacyclohepta[<I>ef</I>]cycl[3.2.2]azines together with bis(1,3a,9-triazacyclopent[<I>a</I>]azuleno)[1,7]diaza[12]annulenes (<B>8</B>), respectively. Reactions of <B>2</B> and <B>6</B> with electron deficient olefins gave <B>4</B> and <B>8</B>, respectively. These reactions proceeded regioselectively <I>via</I> 1,10-dipolar intermediates.
- 公益社団法人 日本化学会の論文
著者
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Yamamoto Hideko
Department Of Molecular Psychiatry Tokyo Institute Of Psychiatry
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Abe Noritaka
Department Of Pure And Applied Chemistry Faculty Of Science And Technology Tokyo University Of Scien
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Nishiwaki Tarozaemon
Department of Chemistry, Faculty of Science, Yamaguchi University
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Kunishige Noboru
Department of Chemistry, Faculty of Sciences, Yamaguchi University
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