title: Organoruthenium(II) and (III) amidinates, (eta5-C5Me5)Ru(eta-amidinate) and (eta5-C5Me5)RuCl(eta-amidinate), as unique redox catalysts for the intramolecular Kharasch reactions: facile access to a pyrrolizidine alkaloid skeleton under mild conditions.
abstract: A novel organoruthenium(III) amidinate, (eta5-C5Me5)RuCl(eta-iPrN=C(Me)NiPr) (2), has been prepared by oxidation of organoruthenium amidinate, (eta5-C5Me5)Ru(eta-iPrN=C-(Me)NiPr) (1), by organic chlorides; both 1 and 2 are found to be good catalysts for atom-transfer cyclization of N-allyltrichloroacetamides which are useful for successful preparation of a pyrrolizidine alkaloid skeleton under mild conditions.
authors.affiliation: Institute of Advanced Material Study, Kyushu University, Kasuga, Fukuoka 816-8580, Japan. nagasima@cm.kyushu-u.ac.jp
authors.forename: Hideo
authors.initials: H
authors.lastname: Nagashima
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Gondo
authors.forename: Satoshi
authors.initials: S
authors.lastname: Masuda
authors.forename: Hideo
authors.initials: H
authors.lastname: Kondo
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Kouki
authors.initials: K
authors.lastname: Matsubara