Pyridine → 1-Butanesulfonic acid, methyl ester

Participants

Reaction Steps

After 1-butanesulfonic acid (10 g, 0.072 mol) was dissolved in methylene chloride (50 mL), pyridine (11 g, 0.14 mol) was added dropwise thereto, and the mixture was reacted at room temperature for 2 hours. After completion of the reaction, the solvent was evaporated under the reduced pressure to dryness to obtain a crude product containing pyridinium 1-butanesulfonate salt. To a suspension of this crude product (5 g, 0.023 mol) in cyclohexane (50 mL), dimethyl sulfate (15 g, 0.12 mol) was added, and the mixture was reacted at 80° C. for 2 hours. The resultant reaction liquid was condensed under the reduced pressure to obtain the desired product of methyl 1-butanesulfonate. Quantitative analysis by 1H-NMR showed a conversion rate of 77%.

Provenance & Evidence