The triflic acid-mediated cyclisation of N-benzylcinnamanilides
摘要:
N-Benzylcinnamanilides cyclise with triflic acid to form 1-benzyl-4-aryl-2,4-dihydro-1H-quinolin-2-ones and 2,5-diaryl-benzazepin-3-ones. The product ratio is determined by the preferred orientation of the amide and by the electronics of the substituents. With ortho-substituted anilides, N-debenzylation also occurs to give 4-aryl-2,4-dihydro-1H-quinoline-2-ones. (C) 2013 Elsevier Ltd. All rights reserved.
A practical and efficient synthesis of (E)-β-aryl-α,β-unsaturated amides
作者:Chih-Ching Chen、Jung-Chieh Ho、Nein-Chen Chang
DOI:10.1016/j.tet.2008.08.057
日期:2008.11
In this paper, we report a one-step convergent synthesis of (E)-β-monosubstituted α,β-unsaturatedamides 3 from α-sulfonyl acetamide 1 and benzyl bromide derivatives 2.
Rapid access to cinnamamides and piper amides <i>via</i> three component coupling of arylaldehydes, amines, and Meldrum's acid
作者:Santanu Ghosh、Chandan K. Jana
DOI:10.1039/c9gc02937k
日期:——
A practical method for the synthesis of cinnamamides and piper amides via a conceptually novel three component reaction of aldehydes, amines and Meldrum's acid has been reported. The reaction proceeds under operationally simple conditions without the aid of coupling reagents, oxidants, or catalysts, which are essential for the preparation of cinnamamides/piper amides via known methods. The formation
The triflic acid-mediated cyclisation of N-benzyl-cinnamamides
作者:Frank D. King、Stephen Caddick
DOI:10.1016/j.tet.2012.11.035
日期:2013.1
N-Benzyl-cinnamamides cyclise with triflic acid to form 5-aryl-benzazepinones and/or cinnamamides. (c) 2012 Elsevier Ltd. All rights reserved.
The triflic acid-mediated cyclisation of N-benzylcinnamanilides
作者:Frank D. King、Stephen Caddick
DOI:10.1016/j.tet.2013.07.075
日期:2013.10
N-Benzylcinnamanilides cyclise with triflic acid to form 1-benzyl-4-aryl-2,4-dihydro-1H-quinolin-2-ones and 2,5-diaryl-benzazepin-3-ones. The product ratio is determined by the preferred orientation of the amide and by the electronics of the substituents. With ortho-substituted anilides, N-debenzylation also occurs to give 4-aryl-2,4-dihydro-1H-quinoline-2-ones. (C) 2013 Elsevier Ltd. All rights reserved.
NHC-catalyzed C–O or C–N bond formation: efficient approaches to α,β-unsaturated esters and amides
作者:Bo Zhang、Peng Feng、Yuxin Cui、Ning Jiao
DOI:10.1039/c2cc32862c
日期:——
Simple and efficient NHC-catalyzed transformations of bromoenal or α,β-dibromoenal into α,β-unsaturated esters or amides with high stereoselectivity through CâO or CâN bond formation have been demonstrated. The NHC-catalyzed processes occur under mild conditions. The ready availability of the starting materials, avoidance of external oxidants and the usefulness of the products all make the strategy attractive.