Process for the production of chiral unsaturated alcohols in...

Details Process for the production of chiral unsaturated alcohols in... Process for the production of chiral unsaturated alcohols in...

C - Chemistry, Metallurgy

07

C

C07C 69/145 (2006.01) C07C 67/283 (2006.01) C07C 69/007 (2006.01)

Patent

CA 2233743

The catalytic asymmetric hydrogenation of enol esters with a vinyllic or acetylenic substituent proceeds with extremely high enantioselectivity using a Rhodium-chiral bisphosphine catalyst. This is at variance with the hydrogenation of enol esters bearing a saturated substituent, which are hydrogenated with only marginal enantioselectivity under the same conditions.

L'hydrogénation catalytique asymétrique d'esters énoliques portant un substituant vinylique ou acétylénique en présence de bisphosphine de rhodium chiral comme catalyseur est un processus extrêmement énantiosélectif, ce qui contraste avec l'hydrogénation d'esters énoliques portant un substituant saturé, dont l'énantiosélectivité est marginale dans les mêmes conditions.

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