One-Pot Click Synthesis of 1N-Alkyl-4-aryl-1,2,3-triazoles from Protected Arylalkynes and Alkyl Bromides
作者:Eli Zysman-Colman、Sébastien Ladouceur、Ahmed Soliman
DOI:10.1055/s-0030-1260256
日期:2011.11
1N-Alkyl-4-aryl-1,2,3-triazoles have been prepared through a multicomponent one-pot protocol from the corresponding (arylethynyl)trimethylsilanes and alkyl bromides. In situ alkyl azide formation and alkyne deprotection followed by copper(I)-catalyzed click cycloaddition afforded the desired 1,4-disubstituted 1,2,3-triazoles in generally good to excellent yield, with only minor observation of the undesired 1,5-regioisomeric cycloadduct. The protocol eliminates the need to use reactive organic azides and terminal alkynes.
通过对应(芳基乙炔基)三甲基硅烷和烷基溴的多组分一锅法方案,已制备了1N-烷基-4-芳基-1,2,3-三唑类化合物。原位形成烷基叠氮化物和炔基去保护,然后通过铜(I)催化的点击环加成反应,通常以良好至优异的产率获得了所需的1,4-二取代-1,2,3-三唑,观察到的不期望的1,5-位异构环加成物仅有微量。该方案消除了对活性有机叠氮化物和末端炔烃的需求。