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Benzofuran derivativesR 0070 Palladium-Catalyzed Sequential Oxidative Cyclization/Coupling of 2-Alkynyl-

phenols and Alkenes: A Direct Entry into 3-Alkenylbenzofurans. — A simple one-pot cyclization of 2-alkynylphenols is followed by a Heck-type coupling with various alkenes. The (E)-isomer is formed as main or exclusive product in the case of substrates (II) and (IV). Alkenes (VIa) and (VIc) produce regioisomers and the nitriles (XI) generate a mixture of E/Z isomers. — (MARTINEZ, C.; ALVAREZ*, R.; AURRECOECHEA, J. M.; Org. Lett. 11 (2009) 5, 1083-1086; Dep. Quim. Org., Fac. Quim., Univ. Vigo, E-36310 Vigo, Spain; Eng.) — R. Simon

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