摘要:
                                The reduction of the trifluoromethylated ketone, 1,1,1-trifluoro-3-phenyl-2-butanone, (1), or its hydrogenated homologue, 3-phenyl-2-butanone, (2), with lithium aluminium hydride (LAH) gave 1,1,1-trifluoro-3-phenyl-2-butanol, (4), or 3-phenyl-2-butanol, (3), respectively, as a mixture of the (R*R*)/(R*S*) isomers. The title compound, C17H14F3NO4, (5), was obtained by a benzoylation reaction of the major diastereoisomer of (4). The threo-(R*R*) configuration is clearly evidenced in the crystal structure of (5). So, in the reduction of (1) or (2), the three isomer is the major product. It is note-worthy that the presence of the CF3 group enhances the diastereoselectivity of the reduction reaction.