title: Heterobimetallic lanthanide/sodium phenoxides: efficient catalysts for amidation of aldehydes with amines.
abstract: Heterobimetallic lanthanide/sodium phenoxides were found to be efficient catalysts for amidation of aldehydes with amines under mild conditions. The reactivity follows the order Nd < Y < Sm for metals and 2,6-(Me)2C6H3O < 2,6-(iPr)2C6H3O < 2,6-(tBu)2C6H3O for phenoxide groups. In comparison with the corresponding monometallic complexes, heterobimetallic complexes show higher activity and a wider range of scope of amines. A cooperation of lanthanide and sodium in this process is proposed to contribute to the high activity of the present catalyst.
authors.affiliation: Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Suzhou University, Suzhou 215123, People's Republic of China.
authors.forename: Junmei
authors.initials: J
authors.lastname: Li
authors.forename: Fan
authors.initials: F
authors.lastname: Xu
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qi
authors.initials: Q
authors.lastname: Shen
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000577:Amides / Q000138:chemical synthesis*; D000588:Amines / Q000737:chemistry*; D002384:Catalysis; D028581:Lanthanoid Series Elements
chemical_list: D000447:Aldehydes; D000577:Amides; D000588:Amines; D028581:Lanthanoid Series Elements