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DPENs

S)-Xylyl-BINAP-RuCl2-(S.S)-DPEN] [CTH-(R)-Xylyl-P-Phos-RuCl2 (/. / -DPEN]... [Pg.75]

Scheme 3.11 Partial mechanistic scheme for the hydrogenation of aryl ketones to give the (S)-alcohol catalyzed by RuCI2((R)-binap)((R,R)-dpen)/KO Bu/H2 as based on the observed mechanism for RuH2((R)-binap)(NH2CMe2CMe2NH2). Scheme 3.11 Partial mechanistic scheme for the hydrogenation of aryl ketones to give the (S)-alcohol catalyzed by RuCI2((R)-binap)((R,R)-dpen)/KO Bu/H2 as based on the observed mechanism for RuH2((R)-binap)(NH2CMe2CMe2NH2).
Noyori et al. recently used ESI-MS to characterize species present in catalytically active solutions during the hydrogenation of aryl-alkyl ketones using their base-free catalyst precursors trans-[Ru((R)-tol-BINAP)((R, RJ-dpenJfHXf/ -BH ] (tol-BI-NAP = 2,2 -bis(ditolylphosphino) -1, T-binaphthyl dpen = 1,2-diphenylethylenedia-mine) in 2-propanol [9b]. Based upon ESI-MS observations, deuterium-labeling studies, kinetics, NMR observations, and other results, the authors proposed that the cationic dihydrogen complex trans-[Ru((R)-tol-BINAP)((R, R)-dpen)(H)( 2-H2)]+ is an intermediate in hydrogenations carried out in the absence of base. [Pg.367]

RuC12 ((R) -binap) (dmf)m -(S,S)-DPEN-KOH 0.2 4 atm i-PrOH highly selec tive 12... [Pg.706]

See other pages where DPENs is mentioned: [Pg.179]    [Pg.401]    [Pg.75]    [Pg.76]    [Pg.77]    [Pg.74]    [Pg.90]    [Pg.90]    [Pg.91]    [Pg.91]    [Pg.454]    [Pg.5]    [Pg.5]    [Pg.16]    [Pg.50]    [Pg.51]    [Pg.51]    [Pg.51]    [Pg.51]    [Pg.51]    [Pg.51]    [Pg.51]    [Pg.52]    [Pg.52]    [Pg.52]    [Pg.52]    [Pg.53]    [Pg.54]    [Pg.54]    [Pg.55]    [Pg.55]    [Pg.55]    [Pg.61]    [Pg.61]    [Pg.65]    [Pg.66]    [Pg.289]    [Pg.636]    [Pg.636]    [Pg.636]    [Pg.636]    [Pg.706]    [Pg.706]    [Pg.706]    [Pg.707]    [Pg.707]    [Pg.858]   
See also in sourсe #XX -- [ Pg.106 , Pg.159 ]



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