An iron(III)-catalyzed three-component coupling reaction of alkynes, CH(2)Cl(2) and amines was developed for facile synthesis of propargylamines. Preliminary mechanism investigation using in situ FT-IR reveals that the crucial Fe-acetylide intermediate could be formed through C-H bond activation of alkynes thanks to cooperative effect of FeCl(3) and 1,1,3,3-tetramethylguanidine.
Highly stereoselective synthesis of cis-β-enaminones mediated by diethyl azodicarboxylate
作者:Xiaoliang Xu、Ping Du、Dongping Cheng、Hong Wang、Xiaonian Li
DOI:10.1039/c2cc16997e
日期:——
Promoted by diethylazodicarboxylate, a novel and highly stereoselective synthesis of cis-beta-enaminones via oxidative dehydrogenation and hydration of the substituted propargylamines was realized. The possible mechanism was also proposed.