title: A mild, catalytic and efficient Nazarov cyclization mediated by phosphomolybdic acid.
abstract: A mild, selective and efficient Nazarov cyclization of divinyl ketones catalyzed by phosphomolybdic acid (PMA) is described. The process demonstrates a broad substrate scope with functional group tolerance under short reaction times. PMA supported on silica gel is more efficient than the bulk catalyst and is recycled up to three times without significant activity loss.
authors.affiliation: Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan, Republic of China.
authors.forename: Kaliyappan
authors.initials: K
authors.lastname: Murugan
authors.forename: Sankareswaran
authors.initials: S
authors.lastname: Srimurugan
authors.forename: Chinpiao
authors.initials: C
authors.lastname: Chen
mesh_terms: D002070:Butadienes / Q000737:chemistry; D002384:Catalysis; D003500:Cyclization; D007659:Ketones / Q000138:chemical synthesis / Q000737:chemistry; D008982:Molybdenum / Q000737:chemistry*; D010756:Phosphoric Acids / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: D002070:Butadienes; D007659:Ketones; D010756:Phosphoric Acids; D012822:Silicon Dioxide; D008982:Molybdenum; C031763:1,3-butadiene; C003125:phosphomolybdic acid