Synthesis and reactions of 3- and 8-ethynyl-1-azaazulenes
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概要
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3-iodo-1-azaazulenes were easily ethynylated by Sonogashira-Hagihara reaction to give 3-ethynyl-1-azaazulenes. Cyclization of 2-amino-3-ethynyl-1-azaazulene was achieved by heating in the presence of copper(II) acetate or copper(II) trifluoromethanesulfonate, and 1,9-diaza-1H-cyclopent[a]azulene derivatives were obrained. Reaction of 2-chloro-1-azaazulene with lithium phenylacetylide gave 3-chloro-1-(2-chloro-1-azaazulen-8-yl)-2-phenyl-2a-aza-2H-cyclopent[cd]azulene together with 2-chloro-8-phenylethynyl-1-azaazulene.
- 日本複素環化学研究所の論文
著者
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Kakehi A
Department Of Chemistry And Material Engineering Faculty Of Engineering Shinshu University
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Akikazu Kakehi
Department Of Chemistry And Material Engineering Faculty Of Engineering Shinshu University
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Fujii Hiroyuki
Yamaguchi Univ. Yamaguchi Jpn
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Abe Noritaka
Tokyo Univ. Sci. Chiba Jpn
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