Facile Construction of [6,6]-, [6,7]-, [6,8]-, and [6,9]Ring-Fused Triazole Frameworks by Copper-Catalyzed, Tandem, One-Pot, Click and Intramolecular Arylation Reactions: Elaboration to Fused Pentacyclic Derivatives
作者:M. Nagarjuna Reddy、K. C. Kumara Swamy
DOI:10.1002/ejoc.201101816
日期:2012.4
A sequential copper-catalyzed, one-pot, click reaction–intramolecular direct arylation, which involves two mechanistically distinct reactions (atom-economical click reaction and direct arylation of 1,2,3-triazole), to generate [6,6]-, [6,7]-, [6,8]-, and [6,9]ring-fused triazoles is reported. Furthermore, a unique divergence of reactivity between the fused triazoles prepared from 2-bromobenzyl azide
连续铜催化、一锅、点击反应-分子内直接芳基化,涉及两个机械上不同的反应(原子经济点击反应和 1,2,3-三唑的直接芳基化),以生成 [6,6]- 、[6,7]-、[6,8]- 和 [6,9] 环稠合三唑被报道。此外,观察到由 2-溴苄基叠氮化物和 2-溴苯基叠氮化物制备的稠合三唑之间反应性的独特差异,导致前者形成稠合五环杂环,后者形成 C-C 偶联、联苯稠合三环产物在 Pd 催化下。所有关键产品均已通过单晶 X 射线晶体学表征。