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[摘要]：1-Aryl-9H-indeno[2,1-c]pyridine-4-carbonitrile derivs., e.g., I, were unexpectedly obtained from the reaction of 2-(2,3-dihydroinden-3-ylidene)malononitrile (II), aldehydes (such as 4-tolualdehyde), and malononitrile in ionic liq. at 90 癈. Modification of the novel reaction protocol resulted in a two-component reaction between II and aryl and heteroaryl aldehydes catalyzed by 10 mol% malononitrile. A 1,5-hydrogen transfer was proposed to occur in the formation of the product. |
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