Aluminium lithium hydride → 5-(Hydroxymethyl)-2-((5-(trifluoromethyl)pyridin-2-yl)oxy)benzonitrile

HRID 474630Notes

Reaction equation

C[O:2][C:3](=O)[C:4]1[CH:9]=[CH:8][C:7]([O:10][C:11]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][N:12]=2)=[C:6]([C:21]#[N:22])[CH:5]=1.[H-].[H-].[H-].[H-].[Li+].[Al+3]>C1COCC1.O>[OH:2][CH2:3][C:4]1[CH:9]=[CH:8][C:7]([O:10][C:11]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:18])[F:19])=[CH:13][N:12]=2)=[C:6]([CH:5]=1)[C:21]#[N:22]

Participants

Conditions

Temperature: -55 °C

Procedure

To a solution of 3-cyano-4-(5-trifluoromethyl-pyridin-2-yloxy)-benzoic acid methyl ester (23 g, 0.070 mol) in anhydrous THF (200 mL) was added portionwise LiAlH4 (4.07 g, 0.11 mmol) at −78° C. The reaction mixture was warmed to −55° C. slowly and stirred for 20 mins, diluted with water (3 mL 0.16 mmol, slow addition), filtered and concentrated. Purification via column chromatography on silica gel (petroleum ether/ethyl acetate=10/1 to 5/1) afforded the title product (12.5 g) as a colorless oil. LCMS: rt=2.81 min, [M+H+]=295.

Workup

filtrationfiltered
concentrationconcentrated
customPurification via column chromatography on silica gel (petroleum ether/ethyl acetate=10/1 to 5/1)

Sources & evidence

ORD record: ord-eb2076152c6c4185b57b9e794c73f997
Source dataset: uspto-grants-2014_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08637536B2

Reaction notes

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