Tadros, Wadie; Awad, Sami B.; Sakla, Alfy B., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 3, p. 199 - 202
Reactions with asymmetric diarylethanes and diarylethylenes. Part XIII. Rearrangements of 1,1-dihalogeno-2,2-diarylethanes and the corresponding 1-halogenoethylenes in boiling ethylene glycol, alone or in the presence of sodium 2-hydroxyethoxide
1,1-Dihalogeno-2,2-di-p-tolylethane in boiling ethylene glycol (98%) gave the corresponding 1-halogenoethylene, the corresponding stilbene, the cyclic acetal 1,1-ethylenedioxy-2,2-di-p-tolylethane, 4,4′-dimethyldeoxybenzoin, di-p-tolylacetaldehyde, and 4,4′-dimethylbenzophenone. The last three compounds are also formed when a solution of the acetal in acidified ethylene glycol (98%) is boiled. The