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Chemical communications (Cambridge, England)

A new synthetic approach to benzoporphyrins and Kröhnke type porphyrin-2-ylpyridines.


PMID 22576564

Abstract

The reaction of 2-formyl-5,10,15,20-tetraphenylporphyrin with aryl methyl ketones and ammonium acetate, in the presence of La(OTf)(3), affords benzoporphyrins and 2-(2,6-diarylpyridin-4-yl)porphyrins. This methodology was used to prepare, for the first time, a 2-(2,2':6',2''-terpyridin-4'-yl)porphyrin. The structures of two 2-(2,6-diarylpyridin-4-yl)porphyrins were confirmed by single-crystal X-ray diffraction.

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