Methyl 2-(4-((2-(3-chlorophenyl)-6-(trifluoromethyl)pyridin-4-yl)methyl)phenyl)acetate → 2-(4-((2-(3-Chlorophenyl)-6-(trifluoromethyl)pyridin-4-yl)methyl)phenyl)ethanol

HRID 1508813Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[CH:13]=[C:12]([CH2:14][C:15]3[CH:20]=[CH:19][C:18]([CH2:21][C:22](OC)=[O:23])=[CH:17][CH:16]=3)[CH:11]=[C:10]([C:26]([F:29])([F:28])[F:27])[N:9]=2)[CH:5]=[CH:6][CH:7]=1>C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[CH:13]=[C:12]([CH2:14][C:15]3[CH:20]=[CH:19][C:18]([CH2:21][CH2:22][OH:23])=[CH:17][CH:16]=3)[CH:11]=[C:10]([C:26]([F:29])([F:27])[F:28])[N:9]=2)[CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 55 °C

Procedure

A 50-mL round bottom flask was charged with methyl 2-(4-((2-(3-chlorophenyl)-6-(trifluoromethyl)pyridin-4-yl)methyl)phenyl)acetate (0.165 g, 0.40 mmol) and THF (10 mL) at rt. Borane-dimethylsulfide complex (0.154 mL, 1.62 mmol) was added and the resulting solution was stirred at 55° C. for 3 h. After this time, the reaction was quenched with methanol then treated with 2N aqueous HCl (5 drops), and concentrated under reduced pressure. The residue was diluted with methanol and then concentrated under reduced pressure. The residue was purified by column chromatography on silica using hexanes/ethyl acetate (10:0 to 1:1) as the eluent followed by column chromatography on silica using hexanes/dichloromethane (10:0 to 0:10) as the eluent to afford the title compound (0.064 g, 18%) as a colorless gum. MW=391.81. 1H NMR (DMSO-d6, 500 MHz) δ 8.33 (s, 1H), 8.17-8.15 (m, 1H), 8.11-8.06 (m, 1H), 7.77 (d, J=0.5 Hz, 1H), 7.60-7.54 (m, 2H), 7.28 (d, J=8.0 Hz, 2H), 7.16 (d, J=8.0 Hz, 2H), 4.58 (t, J=5.0 Hz, 1H), 4.12 (s, 2H), 3.59-3.54 (m, 2H), 2.67 (t, J=5.0 Hz, 2H); APCI MS m/z 392 [M+H]+.

Workup

additionBorane-dimethylsulfide complex (0.154 mL, 1.62 mmol) was added
customAfter this time, the reaction was quenched with methanol
additionthen treated with 2N aqueous HCl (5 drops)
concentrationconcentrated under reduced pressure
additionThe residue was diluted with methanol
concentrationconcentrated under reduced pressure
customThe residue was purified by column chromatography on silica

Sources & evidence

ORD record: ord-00b734a886a14f49b9f6c280c64b70b2
Source dataset: uspto-grants-2015_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09221843B2

Reaction notes

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