反应详情

8.7 g of 1,3-cyclohexanediol and 12 g of dibutyltin oxide are dissolved in 600 ml of toluene and, in a water separator, heated under reflux. 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 DMF, 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 NaCl solution. The organic phase is dried over magnesium sulfate, the solvent is removed 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-hydroxy-cyclohexyloxymethyl)-6-methylbenzoate as an oil. C16H22O4 (278.35), MS(ESI): 279 (M+H+).

1. temperatureheated
2. temperatureunder reflux
3. customDuring the reaction
4. washwashed with saturated NaCl solution
5. dry with materialThe organic phase is dried over magnesium sulfate
6. customthe solvent is removed under reduced pressure
7. customthe residue is purified by flash chromatography on silica gel (n-heptane/ethyl acetate=50:1->1:2)