New chiral oxazaphospholidine oxides as highly efficient catalysts in the enantioselective reduction of ketones

Peper, Viola; Martens, Jürgen

doi:10.1016/0040-4039(96)01928-4

Cited by 30 publications

(2 citation statements)

References 19 publications

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“…21 Again it is likely that this undergoes a reductive ring opening to a compound analogous to 21, and, together with the Buono results, solves the question which we had asked ourselves earlier of a potential catalyst which appeared to decompose yet still gave a good asymmetric induction. We have since found that the two diastereoisomers of 19 give quite different results (Figure 7), suggesting that information about the configuration is retained upon ring-opening and is an important factor in the control of the asymmetric induction.…”

Section: Asymmetric Ketone Reduction Catalysed By Compounds Containinmentioning

confidence: 85%

Applications of Non-Organometallic Phosphorus Reagents in Enantioselective Catalysis

Buono¹,

Chiodi²,

Wills³

1999

Synlett

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Although phosphorus containing ligands are commonly employed for enantioselective catalysis as components of organometallic complexes, recent years have seen a steady growth in the use of non-organometallic phosphorus reagents for similar applications. This review highlights some of the recent literature in this area to date, with particular reference to asymmetric reduction and to C-C and C-N bond forming reactions. The review also serves to highlight some areas of potential future development.

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Section: Asymmetric Ketone Reduction Catalysed By Compounds Containinmentioning

confidence: 85%

Applications of Non-Organometallic Phosphorus Reagents in Enantioselective Catalysis

Buono¹,

Chiodi²,

Wills³

1999

Synlett

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“…Diese Lewis‐basischen Verbindungen reagieren ähnlich, sind als Katalysatoren aber wirksamer, sodass auch mit substöchiometrischen Mengen gute Selektivitäten erzielt werden. Ähnliche Arbeiten zu diesem Thema mit nur wenig verbesserten Ausbeuten und Selektivitäten wurden von Martens und Mitarbeitern341a und Wills und Mitarbeitern341b,c beschrieben. Eine umfangreiche Untersuchung mit weiteren Strukturen ergab keine besseren Selektivitäten.…”

Section: Lewis‐base‐katalyse Ohne Silicium: Neue Reaktivitätsmusterunclassified

Genetically engineered Escherichia coli FBR5: Part II. Ethanol production from xylose and simultaneous product recovery

Qureshi

Dien

Liu

et al. 2012

Biotechnology Progress

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In these studies, concentrated xylose solution was fermented to ethanol using Escherichia coli FBR5 which can ferment both lignocellulosic sugars (hexoses and pentoses). E. coli FBR5 can produce 40-50 g L(-1) ethanol from 100 g L(-1) xylose in batch reactors. Increasing sugar concentration beyond this level results in the loss of sugar with the reactor effluent thus affecting the process yield adversely. In a nonintegrated system without simultaneous product removal more than 120 g L(-1) xylose was left unused of the 220 g L(-1) that was fed into the reactor. In contrast to this, application of simultaneous product removal by gas stripping was able to relieve product inhibition and the culture was able to use 216.6 g L(-1) xylose thus producing 140 g L(-1) (based on reactor volume) ethanol resulting in a product yield of 0.48. The product stream achieved an ethanol concentration up to 148.41 g L(-1). This process has potential for greatly improving the performance of E. coli FBR5 where the strain can ferment all the lignocellulosic sugars to ethanol and gas stripping can be applied to recover product.

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Chiral (o-Hydroxyaryl)oxazaphospholidine Oxides: A New Class of Bifunctional Catalysts in the Enantioselective Borane Reduction of Ketones

2000

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New chiral oxazaphospholidine oxides as highly efficient catalysts in the enantioselective reduction of ketones

Cited by 30 publications

References 19 publications

Applications of Non-Organometallic Phosphorus Reagents in Enantioselective Catalysis

Applications of Non-Organometallic Phosphorus Reagents in Enantioselective Catalysis

Genetically engineered Escherichia coli FBR5: Part II. Ethanol production from xylose and simultaneous product recovery

Chiral (o-Hydroxyaryl)oxazaphospholidine Oxides: A New Class of Bifunctional Catalysts in the Enantioselective Borane Reduction of Ketones

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