Hayashi Rearrangement

M. Hayashi, J. Chem. Soc. 1927, 2516; 1930, 1513, 1520, 1524.

Rearrangement of o-benzoylbenzoic acids in the presence of sulfuric acids or phosphorous pentoxide:

J. W. Cook, J. Chem. Soc. 1932, 1472; M. Hayashi et al., Bull. Chem. Soc. Japan 11, 184 (1936); R. B. Sandin, L. F. Fieser, J. Am. Chem. Soc. 62, 3098 (1940); R. B. Sandin et al., ibid. 78, 3817 (1956); R. Goncalves et al., J. Org. Chem. 17, 705 (1952); S. Cristol, M. L. Caspar, ibid. 33, 2020 (1968); M. Cushman et al., ibid. 45, 5067 (1980).