Jr. Hanson et al., REGIO-CHEMICAL AND STEREOCHEMICAL EFFECTS IN THE HYDROBORATION OF DELTA(2)-STEROIDAL ALLYLIC AND HOMOALLYLIC ALCOHOLS, Journal of chemical research. Synopses, (8), 1997, pp. 282-283
A comparison between the hydroboration of Delta(2)-steroidal 1 alpha-a
llylic and 5 alpha-homoallylic alcohols reveals that whereas both have
a stereochemical directing effect, only the allylic alcohol modifies
the regiospecificity of the reaction.