Abstract
The regiospecific halogen exchange reactions of various easily accessible meso-bromoporphyrins to obtain meso-iodoporphyrins, using η1-palladioporphyrins as intermediates, have been investigated. This one-pot methodology allows the isolation of meso-iodoporphyrins in excellent yields with short reaction times. Similarly meso-(2-bromoethenyl)porphyrins can be converted to their iodoethenyl analogues. These iodoporphyrins show great potential as starting materials for various palladium catalyzed reactions. The X-ray crystal structure of 5-iodo-10,20-diphenylporphyrin has been determined.
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