Lewis Acid-Catalyzed Cyclization of Enaminones with Propargylic Alcohols: Regioselective Synthesis of Multisubstituted 1,2-Dihydropyridines
作者:Yushang Shao、Kai Zhu、Zhengchen Qin、Ende Li、Yanzhong Li
DOI:10.1021/jo4005553
日期:2013.6.7
A highly efficient BF3·Et2O-catalyzed cascade reaction of enaminones with propargylicalcohols under mild reaction conditions has been developed. This methodology offers regioselective access to multisubstituted 1,2-dihydropyridines in good to excellent yields.
Efficient iron-catalyzed synthesis of polysubstituted 1,2-dihydropyridine derivatives
作者:Yi-Wen Liu、Yi-Bi Xie、De-Jiang Li、Long Wang
DOI:10.1134/s1070363215090212
日期:2015.9
A simple ligand-free cyclization of propargylic alcohols with enaminones has been developed by using FeBr3 as catalyst. This reaction provides an easy and convenient method to synthesize polysubstituted 1,2-dihydropyridine derivatives.