反应详情

A mixture of 3,3′-thiodipropionic acid (17.82 g, 10 mmol), allyl alcohol (20.4 mL, 30 mmol) and p-toluenesulfonic acid (0.750 g) in 100 mL of toluene was refluxed for 8 h in a Dean-Stark apparatus to azeotropically remove water. The reaction mixture was quenched with saturated solution of sodium bicarbonate and the toluene layer was separated and washed with saturated sodium chloride solution and dried over anhydrous magnesium sulfate. The solvent was removed in vacuo and gave approximately 20 g of crude 3,3′-thiodipropionic acid, diallyl ester. This material was sufficiently pure by NMR and was used in the subsequent reaction.

1. customThe reaction mixture was quenched with saturated solution of sodium bicarbonate
2. customthe toluene layer was separated
3. washwashed with saturated sodium chloride solution
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was removed in vacuo