STEROIDS, vol.70, no.2, pp.71-75, 2005 (SCI-Expanded)
The stereochemistry of the addition of methylmagnesium bromide to a steroidal 4,5-epoxy-3-ketone has been shown to be determined by the stereochemistry of the epoxide. The epoxidation to the corresponding 3-alkyl-3-hydroxy-4-enes by per-acid was determined by the stereochemistry of the allylic alcohol. (C) 2004 Elsevier Inc. All rights reserved.