title: Synthesis of substituted benzoxacycles via a domino ortho-alkylation/Heck coupling sequence.
abstract: The synthesis of a variety of alkylidene benzoxacycles via a domino palladium-catalyzed ortho-alkylation/intramolecular Heck reaction is described. Under the optimized conditions [Pd(OAc)2 (10 mol %), P(2-Furyl)3 (20 mol %), norbornene (4 equiv), Cs2CO3 (2 equiv), CH3CN, 80 degrees C], aryl iodides with oxygen-tethered Heck acceptors are coupled with alkyl bromides (5 equiv) to generate a variety of six- and seven-membered-ring benzoxacyclic products.
authors.affiliation: Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 Canada.
authors.forename: Andrew
authors.initials: A
authors.lastname: Martins
authors.forename: Udo
authors.initials: U
authors.lastname: Marquardt
authors.forename: Neema
authors.initials: N
authors.lastname: Kasravi
authors.forename: Dino
authors.initials: D
authors.lastname: Alberico
authors.forename: Mark
authors.initials: M
authors.lastname: Lautens
mesh_terms: D000478:Alkylation; D048588:Benzoxazines / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D003500:Cyclization; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D048588:Benzoxazines; D010165:Palladium