title: Asymmetric synthesis of (triaryl)methylamines by rhodium-catalyzed addition of arylboroxines to cyclic N-sulfonyl ketimines.
abstract: Asymmetric addition of arylboroxines to cyclic N-sulfonyl ketimines proceeded in the presence of a rhodium catalyst coordinated with a chiral diene ligand to give high yields of benzosultams, where a triaryl-substituted stereogenic carbon center was created with high enantioselectivity (93-99% ee). The chiral benzosultams were transformed into the chiral (triaryl)methylamines by breaking the cyclic structure.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan. tnishi@kuchem.kyoto-u.ac.jp
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nishimura
authors.forename: Akira
authors.initials: A
authors.lastname: Noishiki
authors.forename: Gavin Chit
authors.initials: GC
authors.lastname: Tsui
authors.forename: Tamio
authors.initials: T
authors.lastname: Hayashi