[CH3:1][C:2]1([CH:8]=[O:9])[CH2:7][CH2:6][O:5][CH2:4][CH2:3]1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[F:28][C:29]([Si](C)(C)C)([F:31])[F:30]>O1CCCC1>[F:28][C:29]([F:31])([F:30])[CH:8]([C:2]1([CH3:1])[CH2:7][CH2:6][O:5][CH2:4][CH2:3]1)[OH:9]According to Reference Example 8-12, by use of 4-methyltetrahydro-2H-pyran-4-carbaldehyde (165 mg, 1.29 mmol) dissolved in tetrahydrofuran (5 mL), a 1 mol/L solution of tetrabutylammonium fluoride in tetrahydrofuran (0.258 mL, 0.258 mmol) and (trifluoromethyl)trimethylsilane (0.229 mL, 1.55 mmol), the mixture was stirred and reacted at room temperature for 1.7 hours. Then, purification by extraction gave 2,2,2-trifluoro-1-(4-methyltetrahydro-2H-pyran-4-yl)ethanol (Compound EC) (119 mg, yield: 47%).
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