5,10,15,20-Tetrakis(2-amino-6-methoxycarbonylphenyl)porphyrin. Synthesis and Separation of Atropisomers Useful for Porphyrin Architecture

Abstract 5,10,15,20-Tetrakis(2-amino-6-methoxycarbonylphenyl)porphyrin was synthesized and three atropisomers in four were successfully separated. Different from the related mono-substituted tetraphenylporphyrins (2-amino- and 2-methoxycarbonylphenylporphyrins), the rotation of the bond between phenyl and porphyrin rings was totally prohibited under thermal isomerization.