Polymer-anchored Ru(II) complex as an efficient catalyst for the synthesis of primary amides from nitriles and of secondary amides from alcohols and amines
作者:Sk Manirul Islam、Kajari Ghosh、Anupam Singha Roy、Rostam Ali Molla
DOI:10.1002/aoc.3233
日期:2014.12
Its catalytic activity was evaluated for the preparation of primaryamidesfromaqueous hydration of nitriles in neutral condition. A range of nitriles were successfully converted to their corresponding amides in good to excellent yields. The catalyst was also effective in the preparation of secondary amidesfrom the coupling of alcohols and amines. The catalyst can be facilely recovered and reused
Direct amide formation from unactivated carboxylic acids and amines
作者:C. Liana Allen、A. Rosie Chhatwal、Jonathan M. J. Williams
DOI:10.1039/c1cc15210f
日期:——
The directcoupling of unactivated carboxylicacids with amines can be performed in toluene 110 degrees C in the absence of catalyst. The use of simple zirconium catalysts at 5 mol% loading gave amide formation in as little as 4 h.
Ruthenium-Catalyzed Oxidation of Alcohols into Amides
作者:Andrew J. A. Watson、Aoife C. Maxwell、Jonathan M. J. Williams
DOI:10.1021/ol900723v
日期:2009.6.18
The synthesis of secondary amides from primary alcohols and amines has been developed using commercially available [Ru(p-cymene)Cl2]2 with bis(diphenylphosphino)butane (dppb) as the catalyst.
Dehydrative amidation reactions under continuous-flow conditions with solid acid catalysts were investigated. High performance molybdenum oxide-supported Zr–Sn mixed metal oxides were applied in reactions between aliphatic carboxylic acids and aliphatic amines, and the desired amides and cyclic imides were obtained in high yields with sufficient space–time yields.
Ruthenium-catalysed oxidation of alcohols to amides using a hydrogen acceptor
作者:Andrew J.A. Watson、Russell J. Wakeham、Aoife C. Maxwell、Jonathan M.J. Williams
DOI:10.1016/j.tet.2014.04.017
日期:2014.6
A wider investigation into the synthesis of secondary amides from primary alcohols using a hydrogen acceptor using commercially available [Ru(p-cymene)Cl-2](2) with bis(diphenylphosphino)butane (dppb) as the catalyst. The report looks at over 50 examples with varying functionality and steric bulk, whilst also covering the first reported results using microwave heating to effect the transformation. (C) 2014 Elsevier Ltd. All rights reserved.