Scheme 1.

Selected milestones in homogeneous ruthenium catalyzed hydrogenation and transfer hydrogenation.a
aBINAP = 2,2′-bis-(diphenylphosphino)-1,1′-binaphthalene. TsDPEN = N-p-Tosyl-1,2-diphenylethylenediamine.

Selected milestones in homogeneous ruthenium catalyzed hydrogenation and transfer hydrogenation.a
aBINAP = 2,2′-bis-(diphenylphosphino)-1,1′-binaphthalene. TsDPEN = N-p-Tosyl-1,2-diphenylethylenediamine.