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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 threo isomer is the major product. It is noteworthy that the presence of the CF3 group enhances the diastereoselectivity of the reduction reaction.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks global, cf45

hkl

Structure factor file (CIF format)
Supplementary material

CCDC reference: 129454

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