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Communication | Regular issue | Vol 23, No. 6, 1985, pp.1399-1402
Published online, 1st January, 1970
DOI: 10.3987/R-1985-06-1399
Boron Trifluoride Etherate-catalysed Rearrangement of 2,4,6,7-Tetraphenyl-1,3-oxazepine to Give Novel Pyridone Ring System

Tomoshige Kobayashi and Makoto Nitta*

*Department of Chemistry, School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan

Abstract

The boron trifluoride etherate causes an efficient rearrangement of 2,4,6,7-tetraphenyl-1,3-oxazepine to lead to 2,2,4,6-tetraphenyl-3-pyridone and 3,3,4,6-tetraphenyl-2-pyridone. The BF3-coordinated pyridine-2,3-oxide is proposed as a reasonable intermediate.