347406-30-8Relevant academic research and scientific papers
A coordinatively unsaturated ruthenium methoxide as a highly effective catalyst for the halogen atom-transfer radical cyclization of N-allyl dichloroacetamides and related reactions
Motoyama, Yukihiro,Hanada, Shiori,Shimamoto, Kazuya,Nagashima, Hideo
, p. 2779 - 2788 (2006)
Atom-transfer radical cyclization (ATRC) catalyzed by coordinatively unsaturated ruthenium alkoxides 4, [(η5-C5Me 5)Ru(OR)]2, is investigated, and ruthenium methoxide 4a (R=Me) is found to exhibit excellent cata
The synthesis of functionalised β- and γ-lactams by cyclisation of enamides using copper(I) or ruthenium(II)
Bryans, Justin S.,Chessum, Nicola E.A.,Parsons, Andrew F.,Ghelfi, Franco
, p. 2901 - 2905 (2001)
Cyclisation of a variety of halo-enamides with copper(I) or ruthenium(II) complexes has been investigated. The regioselectivity of the radical cyclisation, which can proceed via either a 4-exo or 5-endo pathway, to form β- or γ-lactam products respectively, is determined by the nature of the metal oxidant and the reaction conditions. Thus, whereas copper(I)/bipyridine reactions give predominantly γ-lactams, the use of copper(I)/TMEDA or dichlorotris(triphenylphosphine)ruthenium(II) affords mainly β-lactams.
Catalytic atom-transfer radical cyclization by copper/bipyridine species encapsulated in polysiloxane gel
Motoyama, Yukihiro,Kamo, Kazuyuki,Yuasa, Akihiro,Nagashima, Hideo
scheme or table, p. 2256 - 2258 (2010/07/09)
Novel polysiloxane gel, in which CuCl/bipyridine species are immobilized, is prepared by treatment of polymethylhydrosiloxane with 4,4′-bis[(2- propenyl)oxy]-2,2′-bipyridine and 1,5-hexadine in the presence of Karstedt′s catalyst followed by addition of CuCl. This polysiloxane gel acts as a reusable catalyst in the atom-transfer radical cyclization of α-halogenated acetamide derivatives in high turnover numbers without allowing leakage of the metal species.
Organoruthenium(II) and (III) amidinates, (η5-C5Me5)Ru(η-amidinate) and (η5-C5Me5)RuCl(η-amidinate), as unique redox catalysts for the intramolecular Kharasch reactions: Facile access to a pyrrolizidine alkaloid skeleton under mild c
Ngashima, Hideo,Gondo, Mitsuru,Masuda, Satoshi,Kondo, Hideo,Yamaguchi, Yoshitaka,Matsubara, Kouki
, p. 442 - 444 (2007/10/03)
A novel organoruthenium amidinate, (η5-C5Me5)RuCl(η-(i-Pr)N=C(Me)N(i-Pr)) (2), has been prepared by oxidation of organoruthenium amidinate, (η5-C5Me5)Ru(η-(iPr)N=C-Me)N(i-Pr)) (1), by organic chlorides; both 1 and 2 are found to be g
