Title

Formation of chlorins and meso-substituted porphyrins through intramolecular nitrogen-carbon migration of N-substituted porphyrins

Document Type

Article

Publication Date

1-1-2008

Abstract

A series of N-substituted porphyrins were synthesized either by direct alkylation of the symmetrical porphyrins or from the unsymmetrical porphyrins obtained via MacDonald's procedure using the appropriate N-substituted dipyrromethanes. Depending upon the nature of the peripheral substitutions in the porphyrin system, the nickeI(II)-promoted rearrangement of these compounds gave either meso-substituted or unsubstituted Ni(II)porphyrins or chlorins. The chlorins and meso-substituted porphyrins were formed via the intramolecular migration of the N-substituent to carbon. This approach provides easy access for the synthesis of chlorins and the meso-substituted porphyrins, which are otherwise difficult to synthesize. Copyright © 2008 Society of Porphyrins & Phthalocyanines.

Publication Source (Journal or Book title)

Journal of Porphyrins and Phthalocyanines

First Page

131

Last Page

141

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