Dienophilicity of Imidazole in Inverse Electron Demand Diels−Alder Reactions. 4. Intermolecular Reactions with 1,2,4-Triazines
作者:Brian R. Lahue、Zhao-Kui Wan、John K. Snyder
DOI:10.1021/jo030049y
日期:2003.5.1
cycloadditions of 2-substituted imidazoles with various 1,2,4-triazines produced both imidazo[4,5-c]pyridines (3-deazapurines) and pyrido[3,2-d]pyrimid-4-ones (8-deazapteridines). The product distribution was controlled by reactant substituents and influenced by reaction temperature. A regioselective method for the preparation of 6-unsubstituted 1,2,4-triazines was also developed. By using this route to 8-deazapteridines
Indole as a dienophile in inverse electron demand Diels-Alder reactions: reactions with 1,2,4-triazines and 1,2-diazines
作者:Scott C. Benson、Jonathan L. Gross、John K. Snyder
DOI:10.1021/jo00297a050
日期:1990.5
Dienophilicity of Imidazole in Inverse Electron Demand Diels-Alder Reactions; Intermolecular Reactions with 1,2,4-Triazines.
作者:Zhaokui Wan、John K Snyder
DOI:10.1016/s0040-4039(97)01799-1
日期:1997.10
Intermolecular cycloadditions between trialkyl 1,2,4-triazine-4,5,6-tricarboxylates and protected 2-aminoimidazole gave 1H-imidazo[4,5-c]pyridines (3-deazapurines) and the rearranged 3H-pyrido[3,2-d]pyrimid-4-ones (8-deazapteridines). No cycloadditions were observed with imidazole and 2-phenylimidazole. (C) 1997 Elsevier Science Ltd.
Zur Reaktivität elektronenreicher CN-Mehrfachbindungen gegenüber akzeptorsubstituierten 1,2,4-Triazinen