Structure and dynamics of intermediates in asymmetric hydrogenation by rhodium complexes of (2-methoxyphenyl)-P-phenyl-P-(2′-diphenylphosphino) ethylphosphine

Journal of the Chemical Society, Chemical Communications

Volumn , Issue 23, 1995, Pages 2469-2471

  Ramsden, James A ^a   Claridge, Timothy D W ^a   Brown, John M ^a  

^a UNIVERSITY OF OXFORD   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 37049075560     PISSN: 00224936     EISSN: None     Source Type: Journal    
DOI: 10.1039/C39950002469     Document Type: Article

References (20)

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3. Asymmetric Catalysis in Organic Synthesis, ed. R. Noyori, Wiley-Interscience, New York, 1994, ch. 1.
4. A.S.C. Chan and J. Halpern, J. Am. Chem. Soc, 1980, 102, 838.
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8. Further evidence from dynamic 31P NMR is on hand. R. Kadyrov, T. Freier, D. Heller, M. Michalik and R. Selke, J. Chem. Soc, Chem. Commun., 1995, 1745.
9. J. Halpern and C.R. Landis, J. Am. Chem. Soc, 1987, 109, 1746.
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12. E.g. S.K. Armstrong, J.M. Brown and M.J. Burk, Tetrahedron Lett., 1993, 34, 689, and references therein in the present case the disfavoured Re-isomers correlate with the favoured S enantiomer of product, and e.e.s. of 80-85% are obtained.
13. For recent applications of EXSY to organometallic structure, see: M.T. Ashby, G.N. Govindan and A.K. Grafton, J. Am. Chem. Soc, 1994, 116, 4801.
14. A. Gogoll, J. Oernebro, H. Grennberg and J.E. Backvall, J. Am. Chem. Soc, 1994, 116, 3631.
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17. J.M. Brown, P.A. Chaloner and G.A. Morris, J. Chem. Soc. Perkin Trans. 2, 1987, 1597.
18. Prepared as before (ref. 2) but with an improved procedure for the synthesis of 13C-benzaldehyde as oxazolone precursor, cf. H.C. Brown, C. Gundu Rao and S.U. Kulkarni, Synthesis, 1979, 704.
19. J.M. Brown and P.J. Maddox, J. Chem. Soc, Chem. Commun., 1987, 1276.
20. U. Sharma, P.J. Guiry and J.M. Brown, in preparation.