Methanesulfonyl chloride → Methanesulfonic acid 2-bromo-6-methyl-pyridin-4-ylmethyl ester
Reaction equation
[Br:1][C:2]1[CH:7]=[C:6]([CH2:8][OH:9])[CH:5]=[C:4]([CH3:10])[N:3]=1.CCN(C(C)C)C(C)C.[CH3:20][S:21](Cl)(=[O:23])=[O:22]>ClCCl>[Br:1][C:2]1[CH:7]=[C:6]([CH2:8][O:9][S:21]([CH3:20])(=[O:23])=[O:22])[CH:5]=[C:4]([CH3:10])[N:3]=1Participants
5
Conditions
- Temperature
- 0 °C
Procedure
To a solution of (2-bromo-6-methyl-pyridin-4-yl)-methanol (0.300 g, 1.48 mmol) in dichloromethane (2.0 mL) was added DIPEA (776 μL, 4.45 mmol). The resulting mixture was cooled to 0° C. and methanesulfonyl chloride (120 μL, 1.56 mmol) was added. After 1 hour, the reaction mixture was diluted CH2Cl2 (20 mL) and washed with saturated aqueous ammonium chloride (3×10 mL), saturated aqueous sodium bicarbonate (10 mL) and brine (10 mL). The organic layer was dried over MgSO4, filtered and concentrated to afford methanesulfonic acid 2-bromo-6-methyl-pyridin-4-ylmethyl ester as crude product which was used in the next step without purification.
Workup
- washwashed with saturated aqueous ammonium chloride (3×10 mL), saturated aqueous sodium bicarbonate (10 mL) and brine (10 mL)
- dry with materialThe organic layer was dried over MgSO4
- filtrationfiltered
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-9da99370f22945f59c09c4948111f025
- Source dataset
- uspto-grants-2012_12
- Patent number
- US08338610B2
Reaction notes
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