Chiral catalysts for reduction of ketones and process for...

Details Chiral catalysts for reduction of ketones and process for... Chiral catalysts for reduction of ketones and process for...

C - Chemistry, Metallurgy

07

D

260/291, 260/292

C07D 207/08 (2006.01) C07D 209/12 (2006.01) C07D 495/04 (2006.01) C07F 5/02 (2006.01)

Patent

CA 2040606

The chiral catalyst of general structure 1, or its enantiomer Image is prepared by treating the corresponding N-carboxy anhydride of structure 2, Image with an aryl metal, especially a phenyl metal such as an aryl magnesium halide, aryl lithium, aryl zinc or aryl cesium, to form a 1,1-diaryl- methanol of structure Image followed by treatment with a compound of structure, 4 Image the catalyst, wherein R is aromatic, is novel and in some cases superior to the catalyst wherein R is alkyl or aralkyl in directing the chirality of borane-dimethyl sulfide reductions of ketones to secondary alcohols.

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