DMSO methylates a broad range of amines in the presence of formic acid, providing a novel, green and practical method for aminemethylation. The protocol also allows the one‐pot transformation of aromatic nitro compounds into dimethylated amines in the presence of a simple iron catalyst.
Playing Reversi with H and N: A copper‐catalyzed intermolecularregioselectivehydroamination of styrenes with polymethylhydrosiloxane and hydroxylamine derivatives has been developed. The catalysis accommodates challenging β‐substituted substrates. Moreover, the chiral biphosphine‐ligated copper complex successfully forms benzylamines with good enantiomeric ratios.
Hydrogen-Borrowing Amination of Secondary Alcohols Promoted by a (Cyclopentadienone)iron Complex
作者:Xishan Bai、Francesco Aiolfi、Mattia Cettolin、Umberto Piarulli、Alberto Dal Corso、Luca Pignataro、Cesare Gennari
DOI:10.1055/s-0039-1690101
日期:2019.9
(HB) amination has been expanded to secondaryalcohols, which had previously been reported to react only in the presence of large amounts of co-catalysts. A range of cyclic and acyclic secondaryalcohols were reacted with aromatic and aliphatic amines giving fair to excellent yields of the substitution products. The catalyst was also able to promote the cyclization of diols bearing a secondary alcohol
The solid-phase synthesis of tertiary methylamines via the nucleophilic displacement of benzotriazole Mannich adducts with Grignardreagents using a hydroxylamine linker is described. The chemistry is exemplified by the synthesis of the MAO inhibitor α-methylpargyline. Also described is the synthesis of the analgesic Tramadol by an alternative one-pot solid-phase Mannich reaction.
Cp*Ir complex bearing a flexible bridging and functional 2,2′-methylenebibenzimidazole ligand as an auto-tandem catalyst for the synthesis of N-methyl tertiary amines from imines via transfer hydrogenation/N-methylation with methanol
作者:Xiaozhong Chen、Yao Ai、Peng Liu、Chenchen Yang、Jiazhi Yang、Feng Li
DOI:10.1016/j.jcat.2021.08.037
日期:2021.10
A Cp*Ir complex bearing a flexible bridging and functional 2,2′-methylenebibenzimidazole ligand was designed, synthesized, and found to be a general and efficient auto-tandem catalyst for the synthesis of N-methyl tertiary amines from imines via transfer hydrogenation/N-methylation with methanol as both hydrogen source and methylating reagent. In the presence of [Cp*Ir(2,2′-CH2BiBzImH2)Cl][Cl], a range