Synthesis of Complexes using C2 symmetric bis-P ligands (DIOP, BINAP, Cl-MeO-BIPHEP, SEGPHOS, PhanePHOS, DIPAMP, DuPHOS, BDPP, CHIRAPHOS, PPM, PYRPHOS) uses the compound [RuCl2(benzene)], RuCl2(PPh3)3 and trans-RuCl2(NBD)(py)2 as the starting material, while the complexes were prepared in accordance with the procedure published in the literature (Noyori, R.; Takeshi, O.; Hirohito, O. Shohei, H.; Takao, I. J. Am. Chem. Soc. 1995, 117, 2675; Akotsi, O. M.; Meters, K.; Reid, R. D.; McDonald, R.; Bergens, S. H. Chirality 2000, 12, 514-522; BINAP=2,2′-bis(diphenylphosphino)-1,1′-binaphthyl, DIOP=4,5-Bis(diphenylphosphinomethyl)-2,2-dimethyl-1,3-dioxolane, Cl-MeO-BIPHEP=5,5′-Dichloro-6,6′-dimethoxy-2,2′-bis(diphenylphosphino)-1,1′-biphenyl, SEGPHOS=5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole, PhanePHOS=4,12-Bis(diphenylphosphino)-[2.2]-paracyclophane, DIPAMP=1,2-Bis[(2-methoxyphenyl)(phenyl)phosphino]ethane, Me-DuPHOS=1,2-Bis((2S,5S)-2,5-dimethylphospholano)benzene, BDPP=2,4-Bis(diphenylphosphino)pentane, CHIRAPHOS=Bis(diphenylphosphino)butane, PYRPHOS=3,4-bis(diphenylphosphino)-Pyrrolidine, PPM=4-(diphenylphosphino)-2-[(diphenylphosphino)methyl]-Pyrrolidine. Synthesis of Complexes using C1 symmetric bis-P ligand (JosiPHOS, WalPHOS, MandyPHOS) uses the compound RuCl2(PPh3)3 as the starting material which can be obtained easily from hydrated RuCl3 and PPh3 (Steohenson, T. A.; Wilkinson, G. J. Inorg. Nucl. Chem. 1966, 28, 945-956; Josiphos=1-[Diarylphosphano]-2-[1-(dicyclohexylphosphano)ethyl]ferrocene.), while the complexes and RuCl2[(R,S)-Josiphos](PPh3) were prepared in accordance with the procedure published in the literature (Baratta, W.; Ballico, M.; Chelucci, G.; Siega, K.; Rigo, P. Angew. Chem. Int. Ed. 2008, 47, 4362-4365). The monochloride complex (11) was prepared from (10) by reacting with Et3N. The pre-catalysts used for in situ hydrogenation were [RuCl2BINAP(pyridine)2, RuCl2DIOP(pyridine)2, RuCl2(Josiphos)(pyridine)2]. As non-limiting examples of the present invention the synthesis and the characteristics of the complexes (8-25) are described in detail. All the syntheses were carried out under argon atmosphere, using freshly distilled solvents.
