A Sustainable Heterogeneous Iron Catalyst Fe/SBA-15 towards Direct Arylation of Unactivated C(sp3 )−H and C(sp2 )−H Bonds with Arenes

A Sustainable Heterogeneous Iron Catalyst Fe/SBA-15 towards Direct Arylation of Unactivated C(sp3 )−H and C(sp2 )−H Bonds with Arenes