title: Enantioselective Wacker-type cyclization of 2-alkenyl-1,3-diketones promoted by Pd-SPRIX catalyst.
abstract: An enantioselective intramolecular Wacker-type cyclization of 2-alkenyl-1,3-diketones catalyzed by a Pd(II)-SPRIX complex was developed. The reaction proceeded in a 6-endo-trig mode to give the desired chromene derivatives with moderate to good enantioselectivity. Isomerization of C-C double bonds via a pi-allyl Pd intermediate was involved as the key step.
authors.affiliation: The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Takenaka
authors.forename: Suman C
authors.initials: SC
authors.lastname: Mohanta
authors.forename: Mahesh L
authors.initials: ML
authors.lastname: Patil
authors.forename: C V Laxman
authors.initials: CV
authors.lastname: Rao
authors.forename: Shinobu
authors.initials: S
authors.lastname: Takizawa
authors.forename: Takeyuki
authors.initials: T
authors.lastname: Suzuki
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Sasai