反应详情

To a stirred solution of 41.1 g of 3-trityloxy-propionaldehyde in 330 ml of acetone and 120 ml of water were added portionwise, within 90 minutes, 20.65 g of potassium permanganate, the temperature of the mixture being maintained at 20° to 25° C. Stirring was continued for 90 minutes, and then the pH of the mixture was set to 5 by addition of 13 ml of 3N hydrochloric acid. Within 40 minutes, there were added dropwise 200 ml of 38% sodium bisulfite solution at a temperature of 20° to 25° C. The pH was lowered to 2 by the addition of 60 ml of 3N hydrochloric acid, and subsequently the mixture was extracted with 11 of ethyl acetate. The organic layer was washed with water, dried over sodium sulfate, and the solvent was evaporated in vacuo. The residue was crystallized from ethyl acetate/hexane to yield 35.5 g of 3-trityloxy-propionic acid as white solid of m.p. 159°-161° C.

1. waitWithin 40 minutes
2. extractionsubsequently the mixture was extracted with 11 of ethyl acetate
3. washThe organic layer was washed with water
4. dry with materialdried over sodium sulfate
5. customthe solvent was evaporated in vacuo
6. customThe residue was crystallized from ethyl acetate/hexane