Lithium borohydride → ((1S,2R,3R,4S)-4-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(4-fluorophenyl)cyclohexane-1,2-diyl)dimethanol

To a solution of 9.2 g (15.9 mmol) diethyl (1S,2S,3R,4S)-4-{(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethoxy}-3-(4-fluorophenyl)cyclohexane-1,2-dicarboxylate (step F) in 100 mL THF under nitrogen atmosphere at RT was added 2 g (112.4 mmol, excess) LiBH4 powder. The resulting mixture was heated at 68° C. for 2 hr then cooled to RT. The reaction mixture was carefully quenched by the addition of 30 mL water, then extracted with EtOAc. The combined organic extracts were dried over drying agent, filtered and the solvent evaporated under vacuum to give 7.5 g of the crude title compound as an oil which was used without further purification. 1H-NMR (CDCl3): δ: 7.70 (1H, s), 7.20 (2H, s), 7.00 (2H, m), 6.87 (2H, t, J=8.2 Hz), 4.20 (1H, q, J=6.0 Hz), 3.78 (1H, m), 3.67 (1H, m), 3.52 (1H, m), 3.30-3.20 (2H, m), 2.58 (1H, t, J=11.9 Hz), 2.32 (1H, m), 1.87 (1H, m), 1.65 (1H, m), 1.58-1.35 (3H, m), 1.30 (3H, t, J=6.0 Hz).

1. temperaturethen cooled to RT
2. customThe reaction mixture was carefully quenched by the addition of 30 mL water
3. extractionextracted with EtOAc
4. customThe combined organic extracts were dried
5. customover drying agent
6. filtrationfiltered
7. customthe solvent evaporated under vacuum

ORD record

ord-0e5715e3ba4548f7804d546572446ae4

Source dataset

uspto-grants-2010_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07683068B2