Synthesis of 4-amino-1,2,3,4-tetrahydropyridine derivatives by intramolecular nucleophilic addition of tertiary enamides to in-situ generated imines
作者:Shuo Tong、Xu Yang、De-Xian Wang、Liang Zhao、Jieping Zhu、Mei-Xiang Wang
DOI:10.1016/j.tet.2012.05.108
日期:2012.8
reactivity of stable tertiaryenamides in nucleophilic addition reaction with various in-situ generated imines was explored. Under very mild conditions, formyl-bearing tertiaryenamides reacted with both aromatic and aliphatic amines to form imine intermediates. In the absence or presence of p-toluenesulfonic acid as a catalyst, intramolecular nucleophilic addition of enamide to imine functionality