Selective Aerobic Oxidation of Alcohols to Aldehydes, Carboxylic Acids, and Imines Catalyzed by a Ag-NHC Complex
作者:Lei Han、Ping Xing、Biao Jiang
DOI:10.1021/ol501353q
日期:2014.7.3
Silver NHC catalysts have been developed for the selective oxidation of alcohols to aldehydes or carboxylic acids in the presence of BnMe3NOH or KOH under dry air. The aerobic oxidation conditions are mild, and the yield is excellent. Further tandem catalysis enables the one-pot synthesis of imines in excellent yield. Only 0.1 mol % of the catalyst is required.
Abstract Treatment of Ru(NO)Cl3·xH2O with 1 equiv. bidentate Schiff bases in the presence of triethylamine in DMF/THF afforded a series of anionic ruthenium(II) nitrosyl complexes of the type [Et3NH][Ru(κ2-N,O-LR)(NO)Cl3] (HLR = 2-butyliminomethyl-phenol 1, 2-(benzylimino-methyl)-phenol 2, 2-[(4-chloro-phenylimino)-methyl]-phenol 3, 2-[(4-nitro-phenylimino)-methyl]-phenol 4, 2-[(2,6-diisopropyl-ph
Chitosan: a highly efficient renewable and recoverable bio-polymer catalyst for the expeditious synthesis of α-amino nitriles and imines under mild conditions
作者:Mohammad G. Dekamin、Mojtaba Azimoshan、Leila Ramezani
DOI:10.1039/c3gc36901c
日期:——
Bronsted or Lewis acid centers – was found to be a highly efficient renewable and recoverable bio-polymer catalyst for the rapid and convenient synthesis of α-aminonitriles or imines from aromatic aldehydes and amines under mild reaction conditions at room temperature in high to quantitative yields. The α-aminonitrile derivatives were prepared through the Streckerreactionusing trimethylsilyl cyanide
Selective imine formation from alcohols and amines catalyzed by polymer incarcerated gold/palladium alloy nanoparticles with molecular oxygen as an oxidant
Carbon black stabilized, polymer incarcerated gold/palladium alloy nanoparticles (PICB-Au/Pd) act as an efficient, reusable heterogeneous catalyst for imine synthesis from alcohols and amines through a tandem oxidative process using molecular oxygen as the terminal oxidant.
Reactions of co-ordinated ligands. Part IV. The use of aminomagnesium compounds in the preparation of α-amino-acid amides from α-amino-acid ethyl esters
作者:K. Blažević、R. P. Houghton、C. S. Williams
DOI:10.1039/j39680001704
日期:——
The action of benzylamine and magnesium methoxide on the Schiff bases formed from glycine ethyl ester and salicylaldehyde, 2-hydroxy-1-naphthaldehyde, and pentane-2,4-dione results in benzyl amide formation and, in the case of the first two Schiff bases, amine-exchange. It is suggested that the benzyl amide formation occurs by means of chelates which involve the Schiff bases and an aminomagnesium compound