Heterocycles with a bridging nitrogen atom. 15. The novel recyclization of dipyrido[1,2-<Emphasis Type="Italic">a</Emphasis>:1′,2′-<Emphasis Type="Italic">c</Emphasis>]-imidazolium salts to pyrido[1,2-<Emphasis Type="Italic">a</Emphasis>]-benzimidazole-8-carboxaldehydes |
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收稿时间: | 8 December 2004 |
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