N-Octanoyldimethylglycine Trifluoroethyl Ester, an Acyl Donor Leading to Highly Enantioselective Protease-Catalysed Kinetic Resolution of Amines
作者:Severine Queyroy、Nicolas Vanthuyne、Stéphane Gastaldi、Michèle P. Bertrand、Gérard Gil
DOI:10.1002/adsc.201100993
日期:2012.6.18
The use of N‐octanoyldimethylglycine trifluoroethylester as acyldonor in the kineticresolution of aliphatic amines catalysed by proteases led to enantiomeric ratios >200 in most cases. The resolutions mediated by Protex 6L were shown to be much faster than the resolutions achieved with the most efficient commercially available serine proteases, i.e., alkaline protease, Properase 1600L, and Subtilisin
Chemoenzymatic Dynamic Kinetic Resolution of Primary Amines Catalyzed by CAL-B at 38–40 °C
作者:Florent Poulhès、Nicolas Vanthuyne、Michèle P. Bertrand、Stéphane Gastaldi、Gérard Gil
DOI:10.1021/jo201256w
日期:2011.9.2
The (R)-selective chemoenzymatic dynamic kinetic resolution of primary amines was performed at 38-40 degrees C in MTBE, in good to high yields and with high enantiomeric excesses. These reactions associating CAL-B to octanethiol as radical racemizing agent were carried out in the presence of methyl beta-methoxy propanoate as acyl donor, under photochemical irradiation at 350 nm in glassware.
En Route to (<i>S</i>)-Selective Chemoenzymatic Dynamic Kinetic Resolution of Aliphatic Amines. One-Pot KR/Racemization/KR Sequence Leading to (<i>S</i>)-Amides
作者:Lahssen El Blidi、Malek Nechab、Nicolas Vanthuyne、Stéphane Gastaldi、Michèle P. Bertrand、Gérard Gil
DOI:10.1021/jo900074w
日期:2009.4.3
A one-pot sequential process, involving a radical racemization and an enzymatic resolution, provides access to (S)-amides, from racemic amines, with ee and yields ranging from 78 to 94% and 58 to 80%, respectively.