反应详情

To a solution of 1.5 g (10.26 mmol) of (2,2-dimethyl-1,3-dioxan-5-yl)methanol and 1.71 mL of Et3N in 15 mL of DCM, cooled to 0° C., are added 2.15 g (11.3 mmol) of tosyl chloride. The medium is allowed to warm to room temperature, and stirring is continued for 1 hour. The medium is taken up in 100 mL of DCM, washed successively with 0.1N HCl (2×20 mL) and brine (20 mL), dried over Na2SO4, concentrated under reduced pressure and then purified by chromatography on a column of silica gel, eluting with a 99/1 DCM/MeOH mixture. 3 g of (2,2-dimethyl-1,3-dioxan-5-yl)methyl 4-methylbenzenesulfonate are obtained in the form of a colourless oil.

1. washwashed successively with 0.1N HCl (2×20 mL) and brine (20 mL)
2. dry with materialdried over Na2SO4
3. concentrationconcentrated under reduced pressure
4. custompurified by chromatography on a column of silica gel
5. washeluting with a 99/1 DCM/MeOH mixture