Benzopinacolone (2,2,2-Triphenylacetophenone; 1,2,2,2-Tetraphenylethanone) can be synthesized when benzopinacol reacts with acids of moderate strength, causing the pinacol rearrangement. Benzopinacolone can undergo ring-opening rearrangement via appropriate epoxides reacting with acids[1].
References:
[1].Douglas A. Klumpp, et al. Preparation of Condensed Aromatics by Superacidic Dehydrative Cyclization of Aryl Pinacols and Epoxides1a. J. Org. Chem. 1997, 62, 19, 6666–6671.