(4-Trifluoromethyl-pyridin-3-yl)-methanol

(4-Trifluoromethyl-pyridin-3-yl)-methanol Property

storage temp. 

Sealed in dry,Room Temperature

Appearance

Colorless to light yellow Liquid

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

(4-Trifluoromethyl-pyridin-3-yl)-methanol Chemical Properties,Usage,Production

Synthesis

General procedure for the synthesis of (4-trifluoromethyl-3-pyridine)-methanol from 4-trifluoromethylnicotinic acid methyl ester: 0.37 g (9.7 mmol) of lithium aluminum hydride was dissolved in 100 ml of THF and the solution was cooled down to -50 °C. Subsequently, a solution of 2.0 g (9.8 mmol) of methyl 4-trifluoromethylnicotinate dissolved in 30 ml of THF was added slowly and dropwise. The reaction mixture was stirred continuously at -50 °C for 3 h to ensure complete reaction. Upon completion of the reaction, ethyl acetate was added cautiously and stirred briefly before adding water and continuing to stir. The reaction mixture was separated by vacuum filtration and the filtrate was extracted with ethyl acetate. The organic layer obtained by extraction was washed sequentially with water and aqueous sodium chloride solution and subsequently dried with anhydrous magnesium sulfate. The dried solution was distilled under vacuum to remove the solvent, and the residue was purified by silica gel column chromatography (unfolding agent: hexane-ethyl acetate mixed solvent) to finally obtain 0.6 g (35.3% yield) of (4-trifluoromethylpyridin-3-yl)-methanol as a yellow oil. The product was analyzed by 1H-NMR [CDCl3/TMS, δ (ppm)]: 9.00 (1H, s), 8.73 (1H, d), 7.51 (1H, d), 4.95 (2H, s).

References

[1] Patent: EP1364946, 2003, A1. Location in patent: Page/Page column 200-201
[2] Patent: US2005/256004, 2005, A1. Location in patent: Page/Page column 35
[3] Patent: US5756497, 1998, A