Hydrochloric Acid → (4-(Cyclohexylmethyl)-3-(trifluoromethyl)phenyl)methanol

HRID 2040556Notes

Reaction equation

[CH:1]1([CH2:7][C:8]2[CH:17]=[CH:16][C:11]([C:12](OC)=[O:13])=[CH:10][C:9]=2[C:18]([F:21])([F:20])[F:19])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[BH4-].[Li+].C1COCC1.Cl>O1CCOCC1.O>[CH:1]1([CH2:7][C:8]2[CH:17]=[CH:16][C:11]([CH2:12][OH:13])=[CH:10][C:9]=2[C:18]([F:19])([F:20])[F:21])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]1

Participants

Conditions

Temperature: 80 °C

Procedure

To a stirred solution of methyl 4-(cyclohexylmethyl)-3-(trifluoromethyl)benzoate (280 mg, 0.93 mmol) in dioxane (8 mL) was added 2 M lithium borohydride in THF solution (0.93 mL, 1.86 mmol). The reaction mixture was heated at 80° C. for 2 h, cooled down, poured into water, acidified with HCl solution to pH 4, and extracted with ethyl acetate. The combined organics were washed with saturated NaHCO3 solution and water, dried and concentrated. The residue was purified by silica gel column chromatography to give the title compound (190 mg) as a colorless oil. 1H NMR (400 MHz, CDCl3) δ 0.96-1.06 (m, 2H), 1.14-1.22 (m, 3H), 1.62-1.72 (m, 6H), 2.67 (d, J=6.7 Hz, 2H), 4.71 (d, J=5.7 Hz, 2H), 7.29 (d, J=7.9 Hz, 1H), 7.45 (dd, J=8.0 and 1.6 Hz, 1H), 7.62 (d, J=1.6 Hz, 1H).

Workup

temperaturecooled down
extractionextracted with ethyl acetate
washThe combined organics were washed with saturated NaHCO3 solution and water
customdried
concentrationconcentrated
customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record: ord-7873d3a3938443d9869632f024f477b3
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08580841B2

Reaction notes

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