Synthesis of Polysubstituted 2-Aminoimidazoles via Alkene-Diamination of Guanidine with Conjugated α-Bromoalkenones
作者:Sankar K. Guchhait、Neha Hura、Archana P. Shah
DOI:10.1021/acs.joc.6b03021
日期:2017.3.3
A step-economical access to polysubstituted aminoimidazoles has been accomplished via alkene vicinal C–N bonds formation of 2-bromo-2-alkenones with guanidine avoiding its NH-protection/derivatization prerequisite for electronic modulation. The approach has excellent substrate scope, is amenable to diverse guanidine-containing substrates, and introduces distinctive substitutions/functionalities into
通过2-邻位-2-烯酮与胍的烯烃邻位C-N键与胍的形成,避免了其电子保护的NH-保护/衍生化步骤,已实现了分步经济地获得多取代的氨基咪唑。该方法具有优异的底物范围,适用于各种含胍的底物,并且在氨基咪唑核心中引入了独特的取代/功能。它也适用于稠合咪唑的制备。该反应涉及氮杂-迈克尔加成的串联通路,S Ñ通过光谱研究和对照实验2,以及独特的氧化还原中性过程中,由于明显的。