in a ‘green’ solvent. Vinylamides were also used similarly with tert-butyl isonitrile to give 3-(tert-butylimino)-1-quinolin-8-yl-1H-pyrrol-2(5H)-ones. A simple efficient, atom-economical procedure was developed for the cobalt-catalyzed C–H bond annulation of benzamides with isonitriles under mild conditions. The reaction tolerates a variety of functional group including heterocycles. Diverse 3-(al
This paper reports a direct α-(hetero)arylation of acrylamides through an inverse electron-demand nucleophilic addition, specifically an anti-Michael-type addition. The introduction of a quinolyl directing group facilitates the nucleophilic addition of (hetero)arenes to the α-position of acrylamides. The quinolyl directing group effectively suppresses undesired β-hydrogen elimination and is removable
Pd(OAc)<sub>2</sub>-Catalyzed, AgOAc-Promoted <i>Z</i> Selective Directed β-Arylation of Acrylamide Systems and Stereoselective Construction of <i>Z</i>-Cinnamamide Scaffolds
作者:Ramarao Parella、Srinivasarao Arulananda Babu
DOI:10.1021/acs.joc.5b02264
日期:2015.12.18
A Pd(OAc)(2)-catalyzed, AgOAc-promoted and bidentate ligand-directed Z selective C-H activation, followed by the beta-arylation of the C(sp(2))-H bond of N-(quinolin-8-yl)acrylamide systems with aryl- and heteroaryl iodides, and a contemporary method for the construction of various Z-cinnamamides and beta,beta-diarylated acrylamides are reported. A plausible reaction mechanism comprising the bidentate ligand-aided, chelation-based C-H functionalization was proposed for the observed Z selective beta-arylation of N-(quinolin-8-yl)acrylamide systems.
Bioinspired Deamination of <i>α</i>
-Amino Acid Derivatives Catalyzed by a Palladium/Nickel Complex
An efficient bioinspired deamination method of both natural and unnatural aminoacidderivatives has been developed. This method provides easy access to a wide variety of useful α, β‐unsaturated carbonyl compounds. The reaction is realized with two transition metal catalysts (palladium and Nickel) in‐easy handling procedure. A possible reaction pathway is also proposed and the control experiments support