title: Solventless oxidative coupling of amines to imines by using transition-metal-free metal-organic frameworks.
abstract: A highly efficient, simple, and versatile transition-metal-free metal-organic framework catalytic system is proposed for the oxidative coupling of amines to imines. The catalytic protocol features high activities and selectivities to target products; compatibility with a variety of substrates, including aliphatic amines and secondary amines; and the possibility to efficiently and selectively promote amine cross-coupling reactions. A high stability and recyclability of the catalyst is also observed under the investigated conditions. Insights into the reaction mechanism indicate the formation of a superoxide species able to efficiently promote oxidative couplings.
authors.affiliation: Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640 (PR China).
authors.forename: Xuan
authors.initials: X
authors.lastname: Qiu
authors.forename: Christophe
authors.initials: C
authors.lastname: Len
authors.forename: Rafael
authors.initials: R
authors.lastname: Luque
authors.forename: Yingwei
authors.initials: Y
authors.lastname: Li
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D000588:Amines / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D058451:Oxidative Coupling
chemical_list: D000588:Amines; D056831:Coordination Complexes; D007097:Imines; D000535:Aluminum
keywords: cross-coupling; heterogeneous catalysis; imines; metal-organic frameworks; transition-metal-free coupling