Marseille, France
Marseille, France
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Nechab M.,Aix - Marseille University | Besson E.,Aix - Marseille University | Campolo D.,Aix - Marseille University | Perfetti P.,Aix - Marseille University | And 4 more authors.
Chemical Communications | Year: 2011

Mesoporous silica grafted with a tertiary amine was used as a basic nanocatalyst to promote in confined medium the enantioselective cascade rearrangement of enediynes based on the phenomenon of memory of chirality; the multi-substrates recyclable catalytic reagent could easily be recovered by simple filtration, and reused without any decrease in activity even when changing the solvent. © 2011 The Royal Society of Chemistry.

Albalat-Serradeil M.,Clariant | Primazot G.,Clariant | Wilhelm D.,Clariant | Vallejos J.-C.,ISM2 | And 2 more authors.
Amino Acids | Year: 2012

The first successful resolution of rac-a-aminoacetals via diastereoisomeric salt formation with optically pure N-protected aminoacids is reported. The absolute configuration assignment of a-aminoacetal enantiomers is performed by an entirely non-racemizing chemical correlation method involving N-protection and a new efficient hydrolysis step followed by a reduction of the resulting N-protected a-aminoaldehyde intermediates. A racemization method of optically enriched a-aminoacetals is exemplified to allow valorisation of both enantiomers. © Springer-Verlag 2011.

Mondal S.,CNRS Institute of Radical Chemistry | Nechab M.,CNRS Institute of Radical Chemistry | Vanthuyne N.,ISM2 | Bertrand M.P.,CNRS Institute of Radical Chemistry
Chemical Communications | Year: 2012

The tandem Crabbé homologation-radical rearrangement of terminal enediynes leads, in a one-pot procedure, to the enantioselective synthesis of six- and seven-membered ring α-aminoesters bearing a quaternary stereocenter based on the phenomenon of memory of chirality. This journal is © The Royal Society of Chemistry 2012.

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