Abstract

Treatment of 3-phenylazetidin-2-one and 7-phenylazepin-2-one with triflic acid in benzene gave a novel, high yielding conversion to 3,3-diphenylpropionamide and 6,6-diphenylhexanoic acid amide, respectively. However, with AlCl 3, 7-phenylazepin-2-one was converted into 3-phenylazepin-2-one via a retro-Beckman rearrangement.

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