Porphyrin-Amino Acid Conjugates.

An efficient way for the formation of a direct bond between a porphyrin and amino acid through a main chain nitrogen has been optimized and applied in the synthesis of a library of chromophore-amino acid conjugates with slightly modified and adjustable optical properties. The obtained series of hybrid materials shows an optic response characteristic for meso-nitrogen derivatized porphyrinoids. The oxidation with hypervalent iodine shows a regioselective transformation of an amino acid chain changing the character of the final molecule.