Results Cyclization of Trimesitylvinyl Cation to 2, 3-Dimesityl-4, 6-dimethylindene. When sodium trimesitylethenolate, formed from the enol 2 and NaH, was reacted (6)(a) Kaftory, M.; Biali, SE; Rappoport, ZJ Am. Chem. SOC. 1985, 107, 1701.(b) Biali, SE; Rappoport, Z.,