methyl 3-(5-bromo-2-fluorophenyl)-3-((S)-1,1-dimethylethylsulfinamido)-4,4-difluorobutanoate → 4,4-Difluorobutanoate

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Reaction Steps

Chiral separation of methyl 3-(5-bromo-2-fluorophenyl)-3-((S)-1,1-dimethylethylsulfinamido)-4,4-difluorobutanoate (3.8 g, 8.83 mmol) by preparative chiral HPLC on Reprosil Chiral NR column with eluent 5% EtOH/n-heptane to give (S)-methyl 3-(5-bromo-2-fluorophenyl)-3-((S)-1,1-dimethylethylsulfinamido)-4,4-difluorobutanoate (1.55 g, 3.6 mmol, 40.8% yield) as a colourless oil and (R)-methyl 3-(5-bromo-2-fluorophenyl)-3-(S)-1,1-dimethylethylsulfinamido)-4,4-difluorobutanoate (1.65 g, 3.83 mmol, 43.4% yield) as a colorless oil.

Provenance & Evidence