A Modified Procedure for the Synthesis of C3-Symmetric 'Mixed-Tail' Triphenylenes

A modified procedure of the selective cleavage of three of the pentyloxy groups from 2,3,6,7,10,11-hexapentyloxytriphenylene (1) to give C3-symmetric 2,6,10-trihydroxy-3,7,11-tripentyloxytriphenylene (2) is described. The methodology has been extended to provide a convenient route to the C3-symmetric triphenylene derivative 8, with orthogonally protected carboxylic acid groups.