title: New chiral thiophene-salen chromium complexes for the asymmetric Henry reaction.
abstract: Chiral thiophene-salen chromium complexes were investigated in their monomeric form as soluble catalysts in the enantioselective Henry reaction of several aldehydes. The anodic polymerization of one complex led to an insoluble powder that was successfully used as a heterogeneous catalyst for the transformation of 2-methoxybenzaldehyde with enantiomeric excesses up to 77%. The polymerized catalyst was recovered and also recycled in an original multisubstrate procedure.
authors.affiliation: Equipe de Catalyse Moléculaire, ICMMO, UMR CNRS 8182, Université Paris-Sud 11, 91405 Orsay cedex, France.
authors.forename: Anaïs
authors.initials: A
authors.lastname: Zulauf
authors.forename: Mohamed
authors.initials: M
authors.lastname: Mellah
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Schulz
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D002384:Catalysis; D002857:Chromium / Q000737:chemistry*; D000431:Ethanol / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D013237:Stereoisomerism; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D009942:Organometallic Compounds; D013876:Thiophenes; D002857:Chromium; D000431:Ethanol