Tunable and Diastereoselective Brønsted Acid Catalyzed Synthesis of β-Enaminones
作者:Ye-Won Kang、Yu Jin Cho、Seung Jin Han、Hye-Young Jang
DOI:10.1021/acs.orglett.5b03445
日期:2016.1.15
The Brønsted acid catalyzed Meyer–Schuster reaction of hemiaminals was studied for the stereoselective synthesis of β-enaminones. Hemiaminals were formed from propargyl aldehydes (or the oxidation of propargyl alcohols) and amines in the presence of Brønsted acids. A critical step to control the stereochemistry of the products is the protonation of the corresponding allenol intermediate, which is dictated
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.