title: Ruthenium-catalyzed carbonylative cycloaddition of alpha-keto lactones with alkenes or alkynes: the participation of an ester-carbonyl group in cycloaddition reactions as the two-atom assembling unit.
abstract: The reaction of benzofuran-2,3-dione derivatives 1 with CO and alkenes (or alkynes) results in a carbonylative [2+2+1] cycloaddition in which the ester-carbonyl group is incorporated into a two-atom assembling unit to give spirolactone derivatives 2. This reaction provides the first example of an ester-carbonyl group participating in a carbonylative cycloaddition reaction.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. chatani@chem.eng.osaka-u.ac.jp
authors.forename: Naoto
authors.initials: N
authors.lastname: Chatani
authors.forename: Katsuya
authors.initials: K
authors.lastname: Amako
authors.forename: Mamoru
authors.initials: M
authors.lastname: Tobisu
authors.forename: Taku
authors.initials: T
authors.lastname: Asaumi
authors.forename: Yoshiya
authors.initials: Y
authors.lastname: Fukumoto
authors.forename: Shinji
authors.initials: S
authors.lastname: Murai