| abstract |
An efficient syntheses for the preparation of (3R,6S)-3-amino-6-(2,3- difluorophenyl)-1-(2,2,2-trifluoroethyl)azepan-2-one. The process uses a crystallization driven asymmetric transformation to set the amine stereocenter followed by a cis-selective hydrogenation and epimerization to set the benzylic stereocenter and trans geometry. |