反应详情

4.3 g of methyl 2-((1R,3S)-3-hydroxycyclohexyloxymethyl)-6-methylbenzoate are dissolved in 40 ml of dimethylformamide and 1.3 g of sodium hydride (60% strength suspension in paraffin oil) are added. After 40 minutes of stirring, 4 ml of allyl bromide, dissolved in 20 ml of tetrahydrofuran, are added. After 3 hours, 300 ml of ethyl acetate are added and the mixture is washed three times with saturated sodium chloride solution. The combined organic phases are dried over sodium sulfate and the solvents are then removed under reduced pressure. The resulting residue is purified on silica gel using the mobile phase n-heptane:ethyl acetate=50:1→5:1. This gives 2.1 g of methyl 2-((1R,3S)-3-allyloxycyclohexyloxymethyl)-6-methylbenzoate as a yellow oil. C19H26O4 (318.42), MS(ESI): 319 (M+H+).

1. additionare added
2. waitAfter 3 hours
3. washthe mixture is washed three times with saturated sodium chloride solution
4. dry with materialThe combined organic phases are dried over sodium sulfate
5. customthe solvents are then removed under reduced pressure
6. customThe resulting residue is purified on silica gel using the mobile phase n-heptane