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8.7 g of 1,3-cyclohexanediol and 12 g of dibutyltin oxide are dissolved in 600 ml of toluene and heated to the boil under reflux on a water separator. During the reaction, the reaction volume is reduced to half the original volume. After 4 hours, the reaction mixture is cooled to room temperature and 300 ml of dimethylformamide, 9.0 g of methyl 2-bromomethyl-6-methylbenzoate and 9.4 g of cesium fluoride are added. The mixture is stirred at room temperature for 12 hours. The reaction mixture is diluted by addition of ethyl acetate and washed with saturated sodium chloride solution. The organic phase is dried over magnesium sulfate, the solvent is reduced under reduced pressure and the residue is purified by flash chromatography on silica gel (n-heptane/ethyl acetate=50:1→1:2). This gives 6 g of methyl 2-(cis-3-hydroxycyclohexyloxymethyl)-6-methylbenzoate as an oil. C16H22O4 (278.35), MS(ESI): 279 (M+H+).

1. temperatureheated to the boil
2. customDuring the reaction
3. washwashed with saturated sodium chloride solution
4. dry with materialThe organic phase is dried over magnesium sulfate
5. customthe residue is purified by flash chromatography on silica gel (n-heptane/ethyl acetate=50:1→1:2)