Highly Regioselective Phosphine-Promoted [2+2+2] Annulations of Cyanoacetylenes and N-Tosylimines to 1,2-Dihydropyridine-3,5-dicarbonitrile Derivatives
作者:Jinfeng Zhang、Qi Zhang、Xin Ji、Ling-Guo Meng
DOI:10.1055/s-0037-1610708
日期:2019.6
A series of fully functionalized dihydropyridine-3,5-dicarbonitrile derivatives were easily prepared through [2+2+2] annulations of cyanoacetylenes and N-tosylimines in the presence of tertiary phosphine. The scope of the cyclization reaction was investigated, and the high regioselectivity was explained by a rational reaction mechanism.