title: Au(I)-catalyzed cyclization of enynes bearing an olefinic cycle.
abstract: Gold(I)-catalyzed cyclization of enynes containing an olefinic cycle has been studied. The introduction of an olefinic ring instead of a terminal alkene in enynes dramatically increased the yield of the reaction. Enynes having an olefinic cycle were prepared by a rhodium-catalyzed intermolecular [4 + 2] cycloaddition of diynes with butadiene. Consecutive rhodium-catalyzed Diels-Alder/gold(I)-catalyzed cycloisomerization reactions were integrated in a one-pot reaction.
authors.affiliation: Intelligent Textile System Research Center, Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea.
authors.forename: Sang Ick
authors.initials: SI
authors.lastname: Lee
authors.forename: Soo Min
authors.initials: SM
authors.lastname: Kim
authors.forename: Mi Ra
authors.initials: MR
authors.lastname: Choi
authors.forename: Sun Young
authors.initials: SY
authors.lastname: Kim
authors.forename: Young Keun
authors.initials: YK
authors.lastname: Chung
authors.forename: Won-Sik
authors.initials: WS
authors.lastname: Han
authors.forename: Sang Ook
authors.initials: SO
authors.lastname: Kang