A ruthenium(II) complex with a C2-symmetric diphosphine/diamine tetradentate ligand for asymmetric transfer hydrogenation of aromatic ketones

Organometallics

Volumn 15, Issue 4, 1996, Pages 1087-1089

  Gao, Jing Xing ^a   Ikariya, Takao ^b   Noyori, Ryoji ^b,c  

^a XIAMEN UNIVERSITY   (China)

^b JAPAN SCIENCE AND TECHNOLOGY AGENCY   (Japan)

^c NAGOYA UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 3242664987     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om950833b     Document Type: Article

References (22)

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15. 2Ru (833.91): C, 63.32; H, 5.28; N, 3.36. Found: C, 63.07; H, 5.45; N, 3.30.
16. Actual crystallographic analysis was done for (R,R)-4 (Supporting Information). For convenience in the structural comparison, the geometry of the S,S isomer is given.
17. w) = 0.033 (0.027) for 3419 observed reflections (I > 3.00σ-(I)).
18. 5
19. The (S,S)-4-catalyzed reaction of 5a in a 1 M 2-propanol solution at 23 °C gave (R)-6a in 95% ee and in 87% yield after 24 h and in 95% ee and 93% yield after 44 h. The reaction of the p-chloro compound p-5b (0.1 M, 45 °C) afforded (R)-p-6b in 94% ee and in 95% yield after 5 h, and these values did not change even after 29 h.
20. (a) Dennenberg, R. J.; Darensbourg, D. J. Inorg. Chem. 1972, 11, 72-77.
21. (b) Gao, Y.-C.; Shi, Q.-Z.; Kershner, D. L.; Basolo, F. Inorg. Chem. 1988, 27, 188-191.
22. (c) Seligson, A. L.; Trogler, W. C. J. Am. Chem. Soc. 1991, 113, 2520-2527.