Synthesis of 5,10,15,20-tetrakis(2-amino-5-methoxyphenyl)-porphyrin: a versatile building block for porphyrin face selection

A new bis-faced substituted porphyrin has been prepared. The four hydroxyl groups on one side as well as the four amino functions on the other one allow at will, a different functionalization of each face of the macrocycle. The usefulness of this synthon is illustrated.