A series of porphyrin-based porous organic polymers (PPOPs) were synthesized in excellent yields via the Yamamoto–Ullmann couplings of tetrabromo spirobifluorene with several brominated porphyrin monomers. After isolation and demetalation, the metal-free PPOP can be postsynthetically metalated to form a Mn III –PPOP that is catalytically active toward the selective double-epoxidation of divinylbenzene to divinylbenzene dioxide.
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Zhang et al. (2015) studied this question.
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