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Pure Appl. Chem., 2001, Vol. 73, No. 2, pp. 325-329

Asymmetric synthesis with "privileged" ligands

Marco Bandini*, Pier Giorgio Cozzi and Achille Umani-Ronchi

Dipartimento di Chimica "G. Ciamician", University of Bologna, Via Selmi 2, I-40126 Bologna, Italy

Abstract: Different types of chiral "privileged" ligands 1 and 2 in promoting enantioselective addition of allylating agents to aliphatic and aromatic aldehydes are described. Here, a new concept in the asymmetric allylation reaction is presented. Redox [Cr (Salen) ] mediated addition of allyl halides to carbonyl compounds is described, and mechanistic investigations are discussed. These results open access to the fascinating area of the catalytic redox processes mediated by metallo-Salen complexes.