4-Toluenesulfonyl chloride → (4,4-Difluorocyclohexyl)methyl 4-methylbenzenesulfonate

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Reaction Steps

To a solution of Example 184A (8.5 g, 57 mmol) in dichloromethane (100 mL) were added triethylamine (Aldrich, 25 mL, 180 mmol) and tosyl chloride (Aldrich, 11.4 g, 60 mmol). The reaction mixture was stirred at room temperature for 16 hours and washed with water (50 mL) and brine (50 mL). The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography using an Analogix® Intelliflash280™ (SiO2, 0-50% ethyl acetate in hexanes) to afford the title compound. 1H NMR (300 MHz, chloroform-d) δ ppm 1.17-1.42 (m, 2 H) 1.57-1.69 (m, 1 H), 1.70-1.91 (m, 4 H), 1.93-2.18 (m, 2 H), 2.46 (s, 3 H), 3.86 (d, J=6.4 Hz, 2 H), 7.35 (d, J=8.5 Hz, 2 H), 7.78 (d, J=8.1 Hz, 2 H).

Provenance & Evidence