Frustrated Lewis Pair Catalyzed Hydrogenation of Amides: Halides as Active Lewis Base in the Metal-Free Hydrogen Activation
作者:Nikolai A. Sitte、Markus Bursch、Stefan Grimme、Jan Paradies
DOI:10.1021/jacs.8b12997
日期:2019.1.9
reductant is introduced. The reaction proceeds via the hydrogen splitting by B(2,6-F2-C6H3)3 in combination with chloride as the Lewisbase. Density functional theory calculations support the unprecedented role of halides as active Lewisbase components in the frustratedLewispair mediated hydrogen activation. The reaction displays broad substrate scope for tertiary benzoic acid amides and α-branched carboxamides
A Concise Synthesis of (S)-2-(Fluorodiphenylmethyl)pyrrolidine: A Novel Organocatalyst for the Stereoselective Epoxidation of α,β-Unsaturated Aldehydes
A concise synthesis of (S)-2-(fluorodiphenylmethyl)pyrrolidine from cheap, commercially available starting materials is described. Pertinent features of this synthetic route include ease of synthesis, facile purification steps, and an operationally simple deoxyfluorination step to install the C-F bond.
Iridium and B(C6F5)3 co-catalyzed chemoselective deoxygenative reduction of tertiary amides: application to the efficient synthesis and late-stage modification of pharmaceuticals
The Vaska’s complex—tris(pentafluorophenyl)borane combination was found to be a highly efficient cooperative catalysis system for the hydrosilylative reduction of tertiary amides to yield amines under mild conditions. The reaction shows high chemoselectivity, tolerating halide, phenolyl, alkenyl, nitro, nitrile, ester, azido, ketone, and enone functional groups. For unsubstituted cyclohexanone carboxamide