title: Cobalt-catalyzed carbocyclization of o-iodobenzaldehydes and o-iodophenylketones with alkynes.
abstract: [reaction: see text] Treatment of various o-iodobenzaldehydes and o-iodophenyl ketones with alkynes in the presence of Co(dppe)I(2) and Zn powder in acetonitrile at 80 degrees C afforded the corresponding indenols in moderate to excellent yields with exceedingly high regioselectivity. For most unsymmetrical alkynes tested, the carbocyclization gave a single regioisomer.
authors.affiliation: Department of Chemistry, Tsing Hua University, Hsinchu, Taiwan 300, ROC.
authors.forename: Kuo-Jui
authors.initials: KJ
authors.lastname: Chang
authors.forename: Dinesh Kumar
authors.initials: DK
authors.lastname: Rayabarapu
authors.forename: Chien-Hong
authors.initials: CH
authors.lastname: Cheng