Stable and catalytically active iron porphyrin-based porous organic polymer: Activity as both a redox and Lewis acid catalyst

摘要

A new porphyrin-based porous organic polymer (POP) with BET surface area ranging from 780 to 880?m2/g was synthesized in free-base form via the reaction of meso- tetrakis (pentafluorophenyl) porphyrin and a rigid trigonal building block, hexahydroxytriphenylene. The material was then metallated with Fe(III) imparting activity for Lewis acid catalysis (regioselective methanolysis ring-opening of styrene oxide), oxidative cyclization catalysis (conversion of bis(2-hydroxy-1-naphthyl)methanes to the corresponding spirodienone), and a tandem catalytic processes: an in situ oxidation-cyclic aminal formation-oxidation sequence, which selectively converts benzyl alcohol to 2-phenyl-quinazolin-4( 3 H)-one. Notably, the catalyst is readily recoverable and reusable, with little loss in catalytic activity.