STUDIES ON SELECTIVE PREPARATION OF AROMATIC-COMPOUNDS .16. CONVENIENT PREPARATION OF 1,2-DI-SUBSTITUTED AND 1,2,3-TRI-SUBSTITUTED BENZENES USING THE TERT-BUTYL FUNCTION AS A POSITIONAL PROTECTIVE GROUP

Some 1,2-disubstituted benzenes (3a, d-g, and j-m) and 1,2,3-trisubstituted benzenes (3b, c, h, and i) have been prepared by the Lewis acid catalysed trans-t-butylation of the corresponding t-butyl derivatives (1a-m) in the presence of biphenyl used as an acceptor for the t-butyl group.