title: Omega-transaminases as efficient biocatalysts to obtain novel chiral selenium-amine ligands for Pd-catalysis.
abstract: Omega-transaminases have been evaluated as biocatalysts in the reductive amination of organoselenium acetophenones to the corresponding amines, and in the kinetic resolution of racemic organoselenium amines. Kinetic resolution proved to be more efficient than the asymmetric reductive amination. By using these methodologies we were able to obtain both amine enantiomers in high enantiomeric excess (up to 99%). Derivatives of the obtained optically pure o-selenium 1-phenylethyl amine were evaluated as ligands in the palladium-catalyzed asymmetric alkylation, giving the alkylated product in up to 99% ee.
authors.affiliation: Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, CEP 05508-900, São Paulo, SP, Brazil. leandroh@iq.usp.br
authors.forename: Leandro H
authors.initials: LH
authors.lastname: Andrade
authors.forename: Alexandre V
authors.initials: AV
authors.lastname: Silva
authors.forename: Priscila
authors.initials: P
authors.lastname: Milani
authors.forename: Dominik
authors.initials: D
authors.lastname: Koszelewski
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kroutil
mesh_terms: D000478:Alkylation; D000588:Amines / Q000737:chemistry*; D002384:Catalysis; D004952:Esters / Q000138:chemical synthesis / Q000737:chemistry; D007700:Kinetics; D008024:Ligands; D015394:Molecular Structure; D016566:Organoselenium Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D012643:Selenium / Q000737:chemistry*; D013237:Stereoisomerism; D000637:Transaminases / Q000737:chemistry / Q000378:metabolism*
chemical_list: D000588:Amines; D004952:Esters; D008024:Ligands; D016566:Organoselenium Compounds; D000637:Transaminases; D012643:Selenium