title: Rhodium(I)-catalyzed 1,4-conjugate arylation toward β-fluoroalkylated electron-deficient alkenes: a new entry to a construction of a tertiary carbon center possessing a fluoroalkyl group.
abstract: Treatment of β-fluoroalkylated-α,β-unsaturated ketones with 1.2 equiv. of various arylboronic acids in the presence of 5 mol% of [Rh(COD)(2)]BF(4) and 6 mol% of (S)-BINAP in toluene/H(2)O (v/v = 4/1) at the reflux temperature for 3 h gave the corresponding Michael adducts in high yields with over 90% enantioselectivity. Though other electron-deficient alkenes, such as vinylsulfone and vinylphosphonate, were found to be much less reactive in the rhodium-catalyzed conjugate addition with arylboronic acids, the reaction of various arylstannanes toward such electron-deficient alkenes took place very smoothly to afford the corresponding adducts in high yields.
authors.affiliation: Functional Materials Research Laboratories Research & Development Headquarters, Lion Corporation, 7-2-1 Hirai, Edogawa-ku, Tokyo 132-0035, Japan.
authors.forename: Atsunori
authors.initials: A
authors.lastname: Morigaki
authors.forename: Tomoo
authors.initials: T
authors.lastname: Tanaka
authors.forename: Tomotsugu
authors.initials: T
authors.lastname: Miyabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Ishihara
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Konno