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首页> 外文期刊>Chemistry of heterocyclic compounds >SYNTHESIS OF AZOLO[a]PYRIDINES FROM 5-(BROMOMETHYL)HEPT-4-EN-3-ONE AND 5-BROMOPENT-3-EN-2-ONE DERIVATIVES
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SYNTHESIS OF AZOLO[a]PYRIDINES FROM 5-(BROMOMETHYL)HEPT-4-EN-3-ONE AND 5-BROMOPENT-3-EN-2-ONE DERIVATIVES

机译:由5-(溴甲基)HEPT-4-EN-3-ONE和5-BROMOPENT-3-EN-2-ONE衍生物合成偶氮[a]吡啶

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摘要

Alkyl derivatives of 1H-imidazo[1,2-a]pyridin-4-ium, 5H-pyrido[1,2-a]benzimidazol-10-ium, 1H-[1,2,4]-triazolo[4,3-a]pyridin-4-ium, and 3-methylthiazolo[3,2-a]pyridin-4-ium bromides were obtained in two stages from (4Z)-5-(bromomethyl)-2,2,6,6-tetramethylhept-4-en-3-one, 5-bromo-4-methylpent-3-en-2-one, or (3E)-5-bromopent-3-en-2-one by alkylation of 1-alkyl-1H-imidazoles, 1-alkyl-1H-benz-imidazoles, 1-methyl-1H-1,2,4-triazole, and 4-methylthiazole and subsequent cyclization of the quaternary azolium salts in the presence of bases.
机译:1H-咪唑并[1,2-a]吡啶-4-鎓,5H-吡啶[1,2-a]苯并咪唑-10-鎓,1H- [1,2,4]-三唑[4,3]的烷基衍生物-a] pyridin-4-ium和3-methylthiazolo [3,2-a] pyridin-4-ium bromides从(4Z)-5-(bromomethyl)-2,2,6,6-分两个阶段获得四甲基庚烷4-en-3-one,5-溴-4-甲基戊-3-en-2-one或(3E)-5-溴戊-3-en-2-one通过烷基1-H-1H烷基化-咪唑,1-烷基-1H-苯并咪唑,1-甲基-1H-1,2,4-三唑和4-甲基噻唑,随后在碱存在下将季盐环化。

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