title: Gold-catalyzed selective oxidation of 4-oxahepta-1,6-diynes to 2H-pyran-3(6H)-ones and chromen-3(4H)-ones via β-gold vinyl cation intermediates.
abstract: α-Oxo gold carbenes generated in situ via the gold-catalyzed selective oxidation of 4-oxahepta-1,6-diynes were effectively trapped by internal alkynes, resulting in the formation of 2H-pyran-3(6H)-ones, , and chromen-3(4H)-ones, , upon facile trapping the vinyl cation intermediates by an external N-oxide and internal aryl ring system.
authors.affiliation: College of Science, Northwest A&F University, 3 Taicheng Road, Yangling 712100, Shaanxi, China. jikegong@nwsuaf.edu.cn.
authors.forename: Kegong
authors.initials: K
authors.lastname: Ji
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.forename: Bowen
authors.initials: B
authors.lastname: Du
authors.forename: Fang
authors.initials: F
authors.lastname: Yang
authors.forename: Jinming
authors.initials: J
authors.lastname: Gao
mesh_terms: D001578:Benzopyrans / Q000032:analysis / Q000138:chemical synthesis*; D002384:Catalysis; D053280:Diynes / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D050607:Organogold Compounds / Q000032:analysis / Q000138:chemical synthesis; D010084:Oxidation-Reduction; D011753:Pyrones / Q000032:analysis / Q000138:chemical synthesis*; D014753:Vinyl Compounds / Q000032:analysis / Q000138:chemical synthesis
chemical_list: D001578:Benzopyrans; D053280:Diynes; D050607:Organogold Compounds; D011753:Pyrones; D014753:Vinyl Compounds; D006046:Gold