Porous aromatic frameworks containing binaphthyl-dihydroazepine units (cBAPAFs) as catalytic supports for asymmetric reactions

We present the successfully synthesis of a series chiral polymeric aromatic frameworks containing novel enantiopure atropoisomeric 1,1?-binaphthyl-dihydroazepine-based compounds as structural building units named cBAPAFs. Three porous materials with amino, pyridinic and amino-alcohol functionalities were obtained from dibrominated monomers by Suzuki-Miyaura couplings. New surface areas up to 619 m2 g?1 determined Brunauer–Emmett–Teller (BET), high thermal stability. The use nitrogen-based provides useful functional groups allow robust binding site for metal complexes. Thus, after post-synthetic metalation Cu(OAc)2, these have been applied efficient heterogenized catalysts nitroaldol (Henry) reaction multicomponent reaction, affording products comparable enantioselectivity that homogeneous system. also tested organocatalysts asymmetric addition diethylzinc benzaldehyde between nitro-styrene nitroethane. These cBAPAFs could be recycled at least 5 cycles without significant loss in its catalytic efficiency.