反应详情

To a mixture of intermediate (42) (0.0014 mol) and triethylamine (0.0028 mol) in DCM (5 ml), methanesulfonyl chloride (0.0021 mol) was slowly added at room temperature. The reaction mixture was stirred for 16 hours and was then extracted with water. The separated organic layer was dried, filtered and the solvent was evaporated, yielding 0.42 g of (S)-8-bromo-2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-3-methanol methanesulfonate (ester) (intermediate (43).

1. additionwas slowly added at room temperature
2. extractionwas then extracted with water
3. customThe separated organic layer was dried
4. filtrationfiltered
5. customthe solvent was evaporated