Brønsted Acid Cocatalysts in Photocatalytic Radical Addition of α-Amino C–H Bonds across Michael Acceptors
作者:Laura Ruiz Espelt、Eric M. Wiensch、Tehshik P. Yoon
DOI:10.1021/jo400428m
日期:2013.4.19
In marked contrast to the variety of strategies available for oxidation and nucleophilic functionalization of methylene groups adjacent to amines, relatively few approaches for modification of this position with electrophilic reaction partners have been reported. In the course of an investigation of the reactions of photogenerated α-amino radicals with electrophiles, we made the surprising observation
Olefination via Cu-Mediated Dehydroacylation of Unstrained Ketones
作者:Xukai Zhou、Yan Xu、Guangbin Dong
DOI:10.1021/jacs.1c09587
日期:2021.12.8
unique reaction pathway involving aromatization-driven C–C cleavage to remove the acyl moiety, followed by Cu-mediated oxidative elimination to form an alkene between the α and β carbons. The newly adopted N′-methylpicolinohydrazonamide (MPHA) reagent is key to enable efficient cleavage of ketone C–C bonds at room temperature. Diverse alkyl- and aryl-substituted olefins, dienes, and special alkenes