Yields reported are those of isolated purified products and have not been optimized. Spectral data obtained for these compounds are consistent with assigned structures. Reference 5. 6, 7-Dimethyl. Reference 18. Although presumably both the 6 and 7 isomers were formed, only the former was isolated. 7-Chloro. Reference 19. p-tolyl sulfone with benzaldehyde in a two-phase system in the presence of triethylbenzylammonium chloride ...