Methyl p-toluenesulfonate → p-Toluenesulfonic acid

Participants

Reaction Conditions

Reaction Steps

When the reaction ended, the mixture was allowed to cool and was left to stand overnight. The crystals that precipitated were filtered out, washed with dimethyl formamide, and dried under reduced pressure, yielding 3.0 g of intermediate B. To 2.0 g of intermediate B was then added 20 mL of p-toluenesulfonic acid methyl ester, and the mixture was stirred with heating for 6 hours at 120° C. The mixture was allowed to cool, after which 30 mL of ethyl acetate was added, and stirring was conducted for 30 minutes. The precipitating crystals were filtered out and dried, yielding 2.75 g of p-toluenesulfonate of V-1.

Provenance & Evidence