The acid-mediated ring opening/cyclisation reaction of N-benzyl-α-aryl-azetidinones
摘要:
N-Benzyl-4-aryl-azetidinones undergo ring opening with triflic acid to form N-benzyl-cinnamamides, which either undergo cyclisation to give 5-aryl-benzazepin-3-ones or N-debenzylation to give cinnamamides. (C) 2012 Elsevier Ltd. All rights reserved.
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.