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Dive into the research topics where Oliver Knopff is active.

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Featured researches published by Oliver Knopff.


Chemistry: A European Journal | 2010

(+)-(R,Z)-5-Muscenone and (−)-(R)-Muscone by Enantioselective Aldol Reaction and Grob Fragmentation

Charles Fehr; Andrea K. Buzas; Oliver Knopff; Jean-Yves de Saint Laumer

(+)-(R,Z)-5-Muscenone ((R)-1) was synthesized by an enantioselective aldol reaction, catalyzed by new ephedrine-type Ti reagents (up to 70 % enantiomeric excess). Substrate-directed diastereoselective reduction of the aldol product and Grob fragmentation of the tosylate of the resultant 1,3-diol afforded (+)-1. This approach also gave access to (-)-(R,E)-5-muscenone and (-)-(R)-muscone.


Archive | 2001

CCDC 143893: Experimental Crystal Structure Determination

Reinhard W. Hoffmann; Bettina Hölzer; Oliver Knopff; Klaus Harms

Related Article: Reinhard W. Hoffmann, Bettina Holzer, Oliver Knopff and Klaus Harms|2000|Angew.Chem.,Int.Ed.|39|3072|doi:10.1002/1521-3773(20000901)39:17 3.0.CO;2-4


Angewandte Chemie | 2000

Asymmetric Synthesis of a Chiral Secondary Grignard Reagent

Reinhard W. Hoffmann; Bettina Hölzer; Oliver Knopff; Klaus Harms


Organic Letters | 2002

Tandem asymmetric conjugate addition-silylation of enantiomerically enriched zinc enolates. Synthetic importance and mechanistic implications

Oliver Knopff; Alexandre Alexakis


Angewandte Chemie | 2000

Asymmetrische Synthese eines chiralen sekundären Grignard‐Reagens

Reinhard W. Hoffmann; Bettina Hölzer; Oliver Knopff; Klaus Harms


Angewandte Chemie | 2007

Enantioselective Intramolecular Aldol Addition/Dehydration Reaction of a Macrocyclic Diketone: Synthesis of the Musk Odorants (R)‐Muscone and (R,Z)‐5‐Muscenone

Oliver Knopff; Jérome Kuhne; Charles Fehr


Organic Letters | 2001

Amination of grignard reagents with retention of configuration.

Reinhard W. Hoffmann; Bettina Hölzer; Oliver Knopff


Angewandte Chemie | 2000

Formation of Rearranged Grignard Reagents by Carbenoid-C-H Insertion

Reinhard W. Hoffmann; Oliver Knopff; Andreas Kusche


Angewandte Chemie | 2000

Bildung umgelagerter Grignard‐Reagentien durch Carbenoid‐C‐H‐Einschiebung

Reinhard W. Hoffmann; Oliver Knopff; Andreas Kusche


Organometallics | 2003

Energetics of iodine ate complexes, intermediates in the iodine/magnesium exchange on 1,1-diiodoalkanes

Michael Müller; Mark Brönstrup; Oliver Knopff; Volker Schulze; Reinhard W. Hoffmann

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