to the Lindsey procedure, to a series of octa- and dodeca-substituted porphyrins. This procedure, which consists of a palladium-catalysed oxidative alkoxycarbonylation of N-substituted dipropargylamine derivatives 1, works nicely for n-alkyl alcohols in the range C1 to C14. The thermotropic behaviour of this series of porphyrins (28 compounds) has been investigated using polarization microscopy, DSC