title: Polyphosphoric acid promoted synthesis of 10,11-dihydrobenzo[j]fluoranthen-12-one.
abstract: A straightforward synthesis of 3,8-dimethoxy-10,11-dihydrobenzo[j]fluoranthen-12-ones 1 is reported in a seven-step route from biphenyl-4,4'-diol 2 via the transformation of a double Claisen rearrangement, cross metathesis with ethyl acrylate, and polyphosphoric acid (PPA)-promoted Friedel-Crafts electrophilic benzannulation in good yields.
authors.affiliation: Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan. mychang@kmu.edu.tw
authors.forename: Meng-Yang
authors.initials: MY
authors.lastname: Chang
authors.forename: Tein-Wei
authors.initials: TW
authors.lastname: Lee
authors.forename: Ming-Hao
authors.initials: MH
authors.lastname: Wu
mesh_terms: D002384:Catalysis; D005449:Fluorenes / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D010756:Phosphoric Acids / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*
chemical_list: C573734:10,11-dihydrobenzo(j)fluoranthen-12-one; D005449:Fluorenes; D010756:Phosphoric Acids; D011108:Polymers; C047269:polyphosphoric acid