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