Aluminum chloride-amine complexes promote transamidation reactions of primary, secondary, and tertiary amides. Combining this method with the known activating effect of an electron-withdrawing group on the amide nitrogen allows transamidation reactions with hindered and aromatic amines.
Aerobic photooxidation of benzylamide under visible light irradiation with a combination of 48% aq HBr and Ca(OH)2
摘要:
Benzylamides were found to be oxidized to their corresponding diacylamines in the presence of molecular oxygen, catalytic 48% aq HBr, and Ca(OH)(2) under visible light irradiation of a fluorescent lamp. (C) 2010 Elsevier Ltd. All rights reserved.
I<sub>2</sub>/Aqueous TBHP-Catalyzed Coupling of Amides with Methylarenes/Aldehydes/Alcohols: Metal-Free Synthesis of Imides
作者:Hariprasad Aruri、Umed Singh、Sanjay Kumar、Manoj Kushwaha、Ajai Prakash Gupta、Ram A. Vishwakarma、Parvinder Pal Singh
DOI:10.1021/acs.orglett.6b01684
日期:2016.8.5
We present a metal-free method for the synthesis of imides by the direct coupling of NH-amides with methylarenes under iodine/aqueous TBHP conditions. The optimized conditions worked very well with benzaldehydes and benzyl alcohol and furnished the corresponding imides in good to excellent yields. A series of control and radical scavenger experiments were also performed, which suggested the involvement
Acyl Iodides in Organic Synthesis. Reaction of Acyl Iodides with N,N-Dimethyl Carboxylic Acid Amides
作者:M. G. Voronkov、I. P. Tsyrendorzhieva、V. I. Rakhlin
DOI:10.1134/s1070428010100064
日期:2010.10
Acyl iodides RCOI (R = Me, Ph) reacted with N,N-dimethylformamide and N,N-dimethylacetamide Me2NC(=O)R’ (R’ = H, Me) along two concurrent pathways involving transacylation and cleavage of the Me-N bond. The first pathway leads to the formation of acyl group exchange products, and the second, to the corresponding imides R’CON(Me)COR.
Fe-Catalysed oxidative C–H/N–H coupling between aldehydes and simple amides
作者:Jing Wang、Chao Liu、Jiwen Yuan、Aiwen Lei
DOI:10.1039/c4cc01447b
日期:——
A novel oxidative coupling of aldehydes with simple amides, most likely involving a radical process, was achieved through the use of an iron catalyst. Various amides were utilized as substrates to easily construct imides by coupling with aldehydes. A catalytic cycle involving the benzoyl halide intermediate is proposed based on our experimental results.
Oxidation of tertiary benzamides by 5,10,15,20-tetraphenylporphyrinatoiron<sup>III</sup>chloride–tert-butylhydroperoxide
作者:Luis Constantino、Jim Iley
DOI:10.1039/b404169k
日期:——
no steric hindrance to oxidation of an isopropyl group. Thus, we propose that these reactions proceed via hydrogenatomabstraction to form an alpha-carbon-centred radical and we attribute the observed diminished reactivity of the N-cyclopropyl group to its known reluctance to form a cyclopropyl radical. Oxidation of N-methyl-N-(2,2,3,3-tetramethylcyclopropyl)methylbenzamide provides preliminary evidence