144285-04-1Relevant articles and documents
COPPER(II) IN ORGANIC SYNTHESIS. X. THE IMPORTANCE OF STERIC HINDRANCE IN THE DESIGN OF CHIRAL TRIDENTATE LIGAND COPPER(II) CATALYSTS FOR ENANTIOSELECTIVE MICHAEL REACTIONS
Desimoni, Giovanni,Faita, Giuseppe,Mellerio, Giorgio,Righetti, Pier Paolo,Zanelli, Claudio
, p. 269 - 273 (2007/10/02)
Several copper(II) complexes with tridentate chiral ligands derived from 2-substituted 2-aminoethanols have been tested as catalysts for enantioselective Michael reactions.The degree of enantioselection increases with the increase of the steric hindrance of the substituents and the best result (65percent e.e.) was obtained with the benzyl-substituted catalyst.A comparison of these results with those obtained with complexes derived from 2-amino-1-indanols gives useful information about the requirements for the optimization of the catalyst design.