Water → (2,3,4,5-Tetrafluoro-6-methylphenyl)methanol

참여 물질

반응 단계

3,4,5,6-tetrafluoro-2-toluic acid (500 mg) was dissolved in dry diethyl ether (5.0 ml) added dropwise to a suspension of lithium aluminium hydride (100 mg) in dry ether (10 ml) under an argon atmosphere at the ambient temperature. When the addition was complete and the effervescence has subsided the mixture was heated at the reflux temperature for a period of 1 hour. After allowing the mixture to cool to the ambient temperature water (10 ml) was cautiously added and the resultant mixture extracted with diethyl ether (2×20 ml), the extracts washed with water and dried over anhydrous magnesium sulphate. After filtration the filtrate was concentrated by evaporation of the solvent. The residual low melting solid was recrystallised from petroelum ether (boiling range 40°-60° C.) to yield 2-methyl-3,4,5,6-tetrafluoro-benzyl alcohol (200 mg). N.m.r. ('H(ppm)CDCl3): 2.18(s,1H); 2.32(t,3H); 4.86(s,2H).

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