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Benzopyran
About: Benzopyran is a research topic. Over the lifetime, 1889 publications have been published within this topic receiving 15235 citations.
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TL;DR: In this paper, the formation of methylene-bis derivatives of benzopyran-4-ones from their Mannich bases was studied, and unsymmetrical methylene derivatives were synthesized by reacting Mannich base of BN with structurally related compounds lacking the dialkylaminomethyl group.
Abstract: The formation of methylene-bis derivatives of benzopyran-4-ones from their Mannich bases was studied. On these grounds, unsymmetrical methylene derivatives have been synthesized by reacting Mannich bases of benzopyran-4-ones with structurally related compounds lacking the dialkylaminomethyl group.
01 Jan 2006
TL;DR: In this article, the synthesis of 1-propyland 1-(3-phenylpropyl)imidazo[1,2-a]indoles with ortho-hydroxy-substituted aromatic aldehydes afforded bridged oxazepino[3,2]-indole derivatives.
Abstract: Kaunas University of Technology, Institute of Synthetic Chemistry, Radvilėnų pl. 19, LT-50270 Kaunas, Lithuania Condensation of 1-propyland 1-(3-phenylpropyl)imidazo[1,2-a]indoles with ortho-hydroxy-substituted aromatic aldehydes afforded 1’-[N-propyland N(3-phenylpropyl)carbamoyl]methylspiro[1-benzopyran-2,2’-indoles]. Treatment of the latter with potassium hydroxide gave bridged oxazepino[3,2-a]indole derivatives.
TL;DR: In this article, a new, general, and efficient method to prepare pyranopyrimidinedione nucleosides, pyraneopyrinediones, and benzopyranones is reported.
Abstract: A new, general, and efficient method to prepare pyranopyrimidinedione nucleosides, pyranopyrimidinediones, and benzopyranones is reported.