Patent ID: 6911560
Filing Date: 2005-06-28
Classification: C07B,C07C,Y02P

Abstract:
1. A process for the preparation of a compound of formula (I), or a single enantiomer thereof, or a salt or a solvate thereof, wherein W is a chiral auxiliary or hydrogen and P 1 and P 2 are each independently chosen from hydrogen or a protecting group, which comprises a) treating a compound of formula (II), or a salt or a solvate thereof, wherein W is a chiral auxiliary and P 1 and P 2 are each independently chosen from a protecting group, with a compound of formula (III) to form a resulting product, b) treating the resulting product with a reducing agent to form the compound of formula (I), or a single enantiomer thereof, or a salt or a solvate thereof.