title: Platinum-catalyzed tandem cycloisomerization reaction of benzoendiynyl esters: regioselective long-range 1,5-acyl migration.
abstract: A Pt(II)-catalyzed intramolecular chemo- and regioselective pentannulation/long-range 1,5-acyl migration reaction is described. This cascade cycloisomerization protocol produces a wide variety of benzofulvene diketones in good to excellent yields with exclusively the Z configuration of the exocyclic double bond of the final product. The (18)O isotope experiment together with (13)C NMR, HRMS, and HMBC analyses confirmed an interesting long-range acyl rearrangement process in this transformation.
authors.affiliation: Key Laboratory of Functional Small Organic Molecules, Ministry of Education, and College of Chemistry & Chemical Engineering, Jiangxi Normal University , Nanchang, Jiangxi 330022 China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Chen
authors.forename: Xuegong
authors.initials: X
authors.lastname: Jia
authors.forename: Jiapian
authors.initials: J
authors.lastname: Huang
authors.forename: Jianjun
authors.initials: J
authors.lastname: Yuan
mesh_terms: D000480:Alkynes / Q000138:chemical synthesis* / Q000737:chemistry; D001555:Benzene Derivatives / Q000737:chemistry*; D002384:Catalysis; D003500:Cyclization; D004952:Esters; D007536:Isomerism; D007659:Ketones / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010984:Platinum / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D000480:Alkynes; D001555:Benzene Derivatives; D004952:Esters; D007659:Ketones; D010984:Platinum