Hydrochloric Acid → HCID 86642237, compound

Participants

Reaction Steps

To 100 g of methylene chloride were added 2.5 g (10 mmol) of a potassium salt of 3-sulfopropyl methacrylate and 23 g (10 mmol) of an aqueous solution of triphenylsulfonium chloride prepared in Synthesis Example 1-1. The mixture was stirred at room temperature for 30 minutes. The organic layer was taken out and washed with water. It was combined with ethanol and concentrated in vacuum while azeotroping off the residual water. There was obtained 3.3 g of triphenylsulfonium 3-methacryloyloxypropanesulfonate. To 3.3 g of triphenylsulfonium 3-methacryloyloxypropanesulfonate were added 100 mg (0.6 mmol) of 28 wt % sodium methoxide in methanol and 15 g of methanol. The mixture was stirred at room temperature for 3 days. Then 70 mg of 35% aqueous hydrochloric acid was added to quench the reaction. The reaction solution was combined with methyl isobutyl ketone and concentrated in vacuum while distilling off the residual water. Diisopropyl ether was added to the residue for recrystallization. The crystals were collected and dried, obtaining the target compound, triphenylsulfonium 3-hydroxypropanesulfonate. White crystals, 2.1 g, yield 52%. The compound, designated PAG intermediate 2, has the following structure.

Provenance & Evidence