Ruthenium-catalysed oxidation of alcohols to amides using a hydrogen acceptor
摘要:
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.
Facile direct synthesis of amides from trichloroethyl esters using catalytic DBU
作者:Minh Thanh La、Hee-Kwon Kim
DOI:10.1139/cjc-2018-0234
日期:2018.12
A practical method for the direct synthesis of amide compounds is described. Using small quantities of DBU as a catalyst, the direct conversion of 2,2,2-trichloroethyl esters to their corresponding...
A Practical and General Amidation Method from Isocyanates Enabled by Flow Technology
作者:Jason D. Williams、William J. Kerr、Stuart G. Leach、David M. Lindsay
DOI:10.1002/anie.201807393
日期:2018.9.10
The addition of carbonnucleophiles to isocyanates represents a conceptually flexible and efficient approach to the preparation of amides. This general synthetic strategy has, however, been relatively underutilized owing to narrow substrate tolerance and the requirement for less favourable reaction conditions. Herein, we disclose a high‐yielding, mass‐efficient, and scalable method with appreciable
decarboxylative amidation of α-ketoacids by using inexpensive tert-butyl hydroperoxide (TBHP), which is characterized by high yields, a broad substrate scope, mild reaction conditions, and a unique chemoselectivity. These features enable the synthesis of peptides from amino acid derived α-ketoacids under preservation of the stereochemical information.
Rhodium-catalyzed oxidative amidation of allylic alcohols and aldehydes: effective conversion of amines and anilines into amides
作者:Zhao Wu、Kami L. Hull
DOI:10.1039/c5sc03103f
日期:——
The rhodium-catalyzed oxidative amidation of allylic alcohols and aldehydes is reported. In situ generated [(BINAP)Rh]BF4 catalyzes the one-pot isomerization/oxidative amidation of allylic alcohols or direct amidation of aldehydes using acetone...
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.