Title

Syntheses of regiospecifically meso functionalized dipyrromethanes, porphyrins, and diphenylethane-linked bisporphyrins

Document Type

Article

Publication Date

1-1-1995

Abstract

Acid catalyzed condensation of 2-unsubstituted pyrroles with diethyl acetals permits preparation, in good yields, of a variety of meso-functionalized dipyrromethanes. Subsequent use in the so-called MacDonald "2 + 2" condensation provides 5-functionalized porphyrins and, eventually, benzochlorin derivatives. A novel application of a reductive coupling scheme, utilizing Ni(0), provides diphenylethane-linked bisporphyrins, which are potential models for electron transfer studies. © 1995.

Publication Source (Journal or Book title)

Heterocycles

First Page

131

Last Page

135

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