首页> 外文期刊>RSC Advances >Sequential one-pot three-step synthesis of polysubstituted 4-(5-(trifluoromethyl)-1H-pyrazol-4-yl)-1H-1,2,3-triazole systems
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Sequential one-pot three-step synthesis of polysubstituted 4-(5-(trifluoromethyl)-1H-pyrazol-4-yl)-1H-1,2,3-triazole systems

机译:多取代的4-(5-(三氟甲基)-1 H -吡唑-4-基)-1 H -1,2的顺序一锅三步合成, 3-三唑系统

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This work reports a successful one-pot three-step protocol for the synthesis of a new series of 15 examples of polysubstituted 4-(5-(trifluoromethyl)-1H-pyrazol-4-yl)-1H-1,2,3-triazoles, in which sequential Sonogashira cross-coupling, desilylation, and a copper(I)-catalyzed azide–alkyne cycloaddition reaction (CuAAC) with an overall yield of up to 72% were used. The presence of a trifluoromethyl substituent attached to the pyrazole moiety made the Sonogashira cross-coupling reaction challenging. Additionally, the selection of the ancillary ligand XPhos was essential and indispensable for the desired heterocyclic construction.
机译:这项工作报告了一个成功的一锅三步操作规程,用于合成一系列新的15个多取代的4-(5-(三氟甲基)-1 H -吡唑-4-基)-实例。 1 H -1,2,3-三唑,其中顺序的Sonogashira交叉偶联,甲硅烷基化和铜( I )催化的叠氮化物-炔烃环加成反应(CuAAC ),总产率高达72%。连接到吡唑部分的三氟甲基取代基的存在使Sonogashira交叉偶联反应具有挑战性。另外,辅助配体XPhos的选择对于所需的杂环结构是必不可少的和必不可少的。

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