Enantioselective allylic oxidation of cycloalkenes by using Cu(II)-tris(oxazoline) complex as a catalyst
作者:Ken-ichi Kawasaki、Tsutomu Katsuki
DOI:10.1016/s0040-4020(97)00322-0
日期:1997.5
Optically active copper(II)-tris(oxazoline) complex that was synthesized as a model compound of the active site of non-heme oxygenase, was found to catalyze allylic oxidation of cycloalkenes to give the corresponding 2-cycloalkenyl benzoates with moderate to excellent enantioselectivity (up to 93% ee) under the Kharash-Sosnovsky reaction conditions. (C) 1997 Elsevier Science Ltd.
Palladium-Catalyzed Enantioselective Allylic Alkylation of Thiocarboxylate Ions: Asymmetric Synthesis of Allylic Thioesters and Memory Effect/Dynamic Kinetic Resolution of Allylic Esters
作者:Bernhard J. Lüssem、Hans-Joachim Gais
DOI:10.1021/jo049756x
日期:2004.6.1
matched acetate of ≥99% ee and the mismatched acetate of ≥99% ee with KSAc. The acetates not only reacted with different enantioselectivities and rates but also suffered an unexpected and concomitant palladium-catalyzed racemization in the presence of the chiral ligand. This led in the case of the mismatched acetate to a temporary dynamic kinetic resolution (DKR) that featured a racemization of the