Simple RuCl3-Catalyzed Amide Synthesis from Alcohols and Amines
作者:Subhash Chandra Ghosh、Soon Hyeok Hong
DOI:10.1002/ejoc.201000362
日期:2010.8
3 , an N-heterocycliccarbene (NHC), and pyridine, was developed. Of the screened NHC precursors, a less bulky one gave better yields for modestly sterically hindered substrates. In a search for the true catalytic intermediates, Grubbs catalysts were found to be active for the amidation of alcohols under basic conditions, suggesting that an Ru complexsupported by an NHC ligand can catalyze the reaction
2-Furanylboronic acid has been identified as an inexpensive and effective catalyst for the dehydrative amide formation of carboxylicacids and amines. This transformation can be efficiently carried out at roomtemperature and is applicable to a wide range of carboxylicacids with primary and secondary amines to afford amides in good to excellent yields.
Penicillin acylase-catalyzed resolution of amines in aqueous organic solvents
作者:L.M. van Langen、N.H.P. Oosthoek、D.T. Guranda、F. van Rantwijk、V.K. Švedas、R.A. Sheldon
DOI:10.1016/s0957-4166(00)00442-0
日期:2000.11
Penicillin acylase from Alcaligenes faecalis catalyzes the enantioselective acylation of amines with phenylacetamide in a kinetically controlled reaction in water at pH II. Addition of cosolvent to the reaction mixture significantly improved the enantioselectivity in most cases. Penicillin acylase from E. coli also catalyzed the phenylacetylation of amines, but an order of magnitude less efficiently than with the enzyme of A. faecalis. Amine resolution via kinetically controlled acylation competes effectively with hydrolysis of N-acylated compounds and constitutes a synthetically useful alternative to existing lipase-based methods. (C) 2000 Elsevier Science Ltd. All rights reserved.
Fe<sup>3+</sup>-Montmorillonite K10: an Efficient Catalyst for Selective Amidation of Alcohols with Nitriles Under Non-Aqueous Condition
作者:M. M. Lakouraj、B. Movassagh、J. Fasihi
DOI:10.1080/00397910008087093
日期:2000.3
An efficient method for preparation of secondary amides by reaction of alcohols with nitriles is described using a catalytic amount of Fe3+-montmorillonite K10.
N-Heterocyclic Carbene Based Ruthenium-Catalyzed Direct Amide Synthesis from Alcohols and Secondary Amines: Involvement of Esters
作者:Cheng Chen、Yao Zhang、Soon Hyeok Hong
DOI:10.1021/jo201756z
日期:2011.12.16
N-heterocyclic carbene based ruthenium complex was developed as a highly active precatalyst for the directamidesynthesisfromalcohols and secondary amines. Notably, reaction of 1-hexanol and dibenzylamine afforded 60% of the corresponding amide using our catalytic system, while no amide formation was observed for this reaction with the previously reported catalytic systems. Unlike the previously reported