regioselective intermolecular 1,2‐aryl‐aminoalkylation of alkenes by photoredox/nickel dual catalysis is described here. This three‐component conjunctive cross‐coupling is highlighted by its first application of primary alkyl radicals, which were not compatible in previous reports. The readily prepared α‐silyl amines could be transferred to α‐amino radicals by photo‐induced single electron transfer step
A photocatalytic aminomethylation of heterocycles with organic dye is reported. The C−C bond formation through a aminomethyl radical formation enables access to a series of functionalized heterocycles in one step with no need of transition metals.
Copper catalyzed <i>N</i>-formylation of α-silyl-substituted tertiary <i>N</i>-alkylamines by air
作者:Yichao Zhao、Lachlan David Bruce、Jianwen Jin、Bo Xia、Philip Wai Hong Chan
DOI:10.1039/d0gc01242d
日期:——
Moreover, it delinates a ligand- and additive-free amine oxidation process mediated by a low-cost metal salt with oxygen from air taking on the role of both the terminal oxidant and as part of the formylation reagent, which is unprecedented in copper catalysis. It also offers the first synthetic method that can selectively generate α-amino radical species as reactive intermediates from α-silylamines under
1,2-Amino Alcohols via Cr/Photoredox Dual-Catalyzed Addition of α-Amino Carbanion Equivalents to Carbonyls
作者:J. Luca Schwarz、Roman Kleinmans、Tiffany O. Paulisch、Frank Glorius
DOI:10.1021/jacs.9b12053
日期:2020.2.5
Herein, we report the synthesis of protected 1,2-aminoalcohols starting from carbonyl compounds (mostly aldehydes) and α-silyl amines. The reaction is enabled by a Cr/photoredox dual catalytic system that allows the in situ generation of α-amino carbanion equivalents which act as nucleophiles. The unique nature of this reaction was demonstrated through the aminoalkylation of ketones and an acyl silane