Differential reactivity of β-amino enones and 3-dimethylaminoacrylaldehyde towards α-amino derivatives
作者:Angel Alberola、José M. Andrés、Alfonso González、Rafael Pedrosa、Martina Vicente
DOI:10.1039/p19900002681
日期:——
Unsubstituted β-amino enones react with α-amino derivatives by a well established route which implies a fast transamination process — 1,4-addition followed by elimination — and cyclodehydration of the intermediate to 3-functionalized pyrroles. In contrast, 3-dimethylaminoacrylaldehyde undergoes 1,2-addition followed by cyclization to give the final 2-substituted pyrroles. Isolation of the intermediates
未取代的β-氨基烯酮通过一种完善的途径与α-氨基衍生物反应,这意味着快速的氨基转移过程-1,4-加成,然后消除-并将中间体环脱水为3-官能化的吡咯。相反,使3-二甲基氨基丙烯醛进行1,2-加成,然后环化,得到最终的2-取代的吡咯。中间体的分离为每种反应提供了建议的机理。