Das Pyrrocorphin-Ligandsystem: Synthese des 2,2,7,7,12,12,17-Heptamethyl-2,3,7,8,12,13-hexahydroporphyrins. Kurzmitteilung

The Pyrrocorphin Ligand System: Synthesis of 2,2,7,7,12,12,17-Heptamethyl-2,3,7,8,12,13-hexahydroporphyrin Reaction Schemes 4 and 6 summarize the synthesis of the title compound, a representative of a recently described novel type of hexahydroporphinoid ligand system (‘pyrrocorphin’). Pyrrocorphins incorporate structural elements of both corrins and porphyrins and are chemically closely related to the tautomeric non-pyrrolic corphins (Scheme 1). The synthesis exemplifies a methodology for constructing pyrrolic hydro-porphinoids with the methods of corrin instead of porphyrin synthesis. An X-ray analysis of 2-(cyanomethyl)-2-methyl-3-oxobutanamide has been carried out.