反应详情

66.0 g (436 mmol) of 2-(5-ethylpyridin-2-yl)ethanol was dissolved in 500 mL of toluene. 72.5 mL (523 mmol) of triethylamine was added to this solution, at room temperature. The resulting solution was cooled between 0 and 10° C., after which 34.0 mL (438 mmol) of methanesulphonyl chloride was added dropwise during 75 minutes. When addition was completed, it was stirred for 1 hour at room temperature. Next, the organic phase was washed with a saturated solution of sodium bicarbonate (400 mL) and with water (400 mL), and was dried over sodium sulphate, obtaining a toluene solution of 2-(5-ethylpyridin-2-yl)ethyl methanesulphonate, a compound of formula (III) in which Z=OMs.

1. temperatureThe resulting solution was cooled between 0 and 10° C.
2. additionWhen addition
3. washNext, the organic phase was washed with a saturated solution of sodium bicarbonate (400 mL) and with water (400 mL)
4. dry with materialwas dried over sodium sulphate