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Volumn 11, Issue 12, 2009, Pages 1992-2000

Ruthenium-catalyzed redox isomerization/transfer hydrogenation in organic and aqueous media: A one-pot tandem process for the reduction of allylic alcohols

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EID: 71549139771     PISSN: 14639262     EISSN: 14639270     Source Type: Journal    
DOI: 10.1039/b916117a     Document Type: Article
Times cited : (68)

References (119)
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    • See, for example
    • See, for example: L. F. Tietze Chem. Rev. 1996 96 115.
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  • 4
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    • Some examples of illustrative reviews on metal-catalyzed tandem processes
    • Some examples of illustrative reviews on metal-catalyzed tandem processes: G. A. Molander C. R. Harris Chem. Rev. 1996 96 307.
    • (1996) Chem. Rev. , vol.96 , pp. 307
    • Molander, G.A.1    Harris, C.R.2
  • 11
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    • For a highly formative review on tandem catalysis see
    • For a highly formative review on tandem catalysis see: D. E. Fogg E. N. dos Santos Coord. Chem. Rev. 2004 248 2365.
    • (2004) Coord. Chem. Rev. , vol.248 , pp. 2365
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    • For recent examples of highly efficient catalysts, see
    • For recent examples of highly efficient catalysts, see: M. Ito S. Kitahara T. Ikariya J. Am. Chem. Soc. 2005 127 6172.
    • (2005) J. Am. Chem. Soc. , vol.127 , pp. 6172
    • Ito, M.1    Kitahara, S.2    Ikariya, T.3
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    • 0001317451 scopus 로고
    • Examples of metal-catalyzed hydrogenation of allylic alcohols can be found in
    • Examples of metal-catalyzed hydrogenation of allylic alcohols can be found in: H. Takaya T. Ohta S. Inoue M. Katimura R. Noyori Org. Synth. 1995 72 74.
    • (1995) Org. Synth. , vol.72 , pp. 74
    • Takaya, H.1    Ohta, T.2    Inoue, S.3    Katimura, M.4    Noyori, R.5
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    • Examples of redox-isomerizations of allylic alcohols in aqueous media can be found in
    • Examples of redox-isomerizations of allylic alcohols in aqueous media can be found in: D. V. McGrath R. H. Grubbs J. W. Ziller J. Am. Chem. Soc. 1991 113 3611.
    • (1991) J. Am. Chem. Soc. , vol.113 , pp. 3611
    • McGrath, D.V.1    Grubbs, R.H.2    Ziller, J.W.3
  • 56
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    • Examples of TH reactions in aqueous media can be found in
    • Examples of TH reactions in aqueous media can be found in: F. Joó A. Bényei J. Organomet. Chem. 1989 363 C19.
    • (1989) J. Organomet. Chem. , vol.363 , pp. C19
    • Joó, F.1    Bényei, A.2
  • 71
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    • 2) can also act as efficient heterogeneous catalysts for this transformation
    • 2) can also act as efficient heterogeneous catalysts for this transformation: J. W. Kim T. Koike M. Kotani K. Yamaguchi N. Mizuno Chem.–Eur. J. 2008 14 4104.
    • (2008) Chem.–Eur. J. , vol.14 , pp. 4104
    • Kim, J.W.1    Koike, T.2    Kotani, M.3    Yamaguchi, K.4    Mizuno, N.5
  • 73
    • 85034334260 scopus 로고    scopus 로고
    • Both individual steps, i.e. the allylic alcohol isomerization and the TH of the carbonyl intermediate, require the use of a base as co-catalyst to promote the formation of the active metal-hydride species. As expected, very low conversions (0–15%) of the substrate were observed in the absence of base
    • Both individual steps, i.e. the allylic alcohol isomerization and the TH of the carbonyl intermediate, require the use of a base as co-catalyst to promote the formation of the active metal-hydride species. As expected, very low conversions (0–15%) of the substrate were observed in the absence of base.
  • 74
    • 85034349760 scopus 로고    scopus 로고
    • tBu) and [Ru] : [base] ratios (from 1 : 1 to 1 : 24) were checked without success
    • tBu) and [Ru] : [base] ratios (from 1 : 1 to 1 : 24) were checked without success.
  • 75
    • 85034345762 scopus 로고    scopus 로고
    • −1. See references 10f–g
    • −1. See references 10f–g.
  • 76
    • 85034369979 scopus 로고    scopus 로고
    • 2] in redox isomerization processes (see ref. 16)
    • 2] in redox isomerization processes (see ref. 16).
  • 78
    • 85034347880 scopus 로고    scopus 로고
    • Coordination of the carbon–carbon double bond is a key step in the different catalytic cycles proposed for the metal-catalyzed redox isomerization of allylic alcohols. For mechanistic discussions see ref. 6
    • Coordination of the carbon–carbon double bond is a key step in the different catalytic cycles proposed for the metal-catalyzed redox isomerization of allylic alcohols. For mechanistic discussions see ref. 6.
  • 88
    • 85034387809 scopus 로고    scopus 로고
    • spite of the insolubility of complex 1 in water, the reduction process proceeded efficiently. A close examination of the reaction mixture showed that it was an emulsion rather than a homogeneous solution, the catalytic reaction probably taking place at the interface
    • In spite of the insolubility of complex 1 in water, the reduction process proceeded efficiently. A close examination of the reaction mixture showed that it was an emulsion rather than a homogeneous solution, the catalytic reaction probably taking place at the interface.
  • 89
    • 85034358901 scopus 로고    scopus 로고
    • 2O conditions. See ref. 11
    • 2O conditions. See ref. 11.
  • 90
    • 85034339505 scopus 로고    scopus 로고
    • Complexes 1 and 2 are commercialized by TCI Laboratory Chemicals and Strem Chemicals Inc., respectively
    • Complexes 1 and 2 are commercialized by TCI Laboratory Chemicals and Strem Chemicals Inc., respectively.
  • 91
    • 85034355927 scopus 로고    scopus 로고
    • We note that a related Ru-catalyzed isomerization/hydrogenation tandem process in aqueous media has been reported
    • We note that a related Ru-catalyzed isomerization/hydrogenation tandem process in aqueous media has been reported:.


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