Synthesis and Mesogenic Properties of Porphyrin Octaesters

Abstract

A new and efficient method of preparing 3,4-pyrrolediacetic diffraction, and miscibility tests. The planarity of the macrocyclic core constitutes the major structural requirement esters 3 is reported, together with their conversion, according to the Lindsey procedure, to a series of octa-and dodeca-for mesophase formation. The mesophase temperature range is controlled by the length of the side chains through the substituted porphyrins. This procedure, which consists of a palladium-catalysed oxidative alkoxycarbonylation of N-melting point and by the strength of π-π interactions among the cores through the clearing point. The same set of rules substituted dipropargylamine derivatives 1, works nicely for n-alkyl alcohols in the range C 1 to C 14 . The thermotropic governing porphyrin packing in the solid state can be employed to predict mesophase formation and organization behaviour of this series of porphyrins (28 compounds) has been investigated using polarization microscopy, DSC, X-ray in porphyrin octaestersAll the liquid-crystalline β-octasubstituted porphyrins ex- [a]

Multicomponent reactions for the synthesis of pyrroles

“…The initial experiments afforded compounds 84, 96 but it was later found that they could be isomerized in situ to the corresponding pyrroles by using dimethylacetamide (DMA) as cosolvent (Scheme 68). 97…”

Use of palladium catalysis in the synthesis of novel porphyrins and phthalocyanines

“…1) [36]. Condensation of the resulting compound with paraformaldehyde in the presence of boron trifluoride etherate gave octasubstituted porphyrins.…”

Properties of meso-tetrakis (4-n-alkanoyloxyphenyl) porphyrin liquid crystal Co and Ni complexes

“…In 1994, 5,15-disubstituted porphyrin, a rod-like liquid crystal, was synthesized by Bruce [5] and a temperature of liquid crystal phase change was 298℃. In 1989, Kubota [6] first used porphyrin liquid crystal for color display, and Yamamoto [7] made a display device using benzoporphyrin liquid crystal in 1990 and applied for a patent. We have studied the liquid crystalline behavior [8] of meso-tetrakis-(4-noyloxy phenyl) porphyrin and its Zn complex.…”