反应详情

590 mg of (2S)-2-(naphthalene-1-sulfonylamino)-3-(4-(2-(1,4,5,6-tetrahydropyrimidin-2-ylcarbamoyl)-ethyl)-benzoylamino)-propionic acid was dissolved in 80 ml of ethanol and 12 drops of concentrated sulfuric acid was added. The reaction solution was boiled for 3 hours. The solvent was removed in vacuo, the residue was dissolved in dichloromethane and washed three times with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted once with dichloromethane and the combined organic phase was washed twice with saturated aqueous sodium chloride solution. The organic phase was dried with sodium sulfate, filtered and the solvent was removed in vacuo. The residue was dissolved in 2N aqueous hydrochloric acid. The hydrochloric acid was removed in vacuo, the residue was dissolved in acetonitrile and added to water. This mixture was lyophilized. Yield 381 mg. MS (ES+): m/e=580.3 (M+H)+.

1. customThe solvent was removed in vacuo
2. dissolutionthe residue was dissolved in dichloromethane
3. washwashed three times with saturated aqueous sodium bicarbonate solution
4. extractionThe aqueous phase was extracted once with dichloromethane
5. washthe combined organic phase was washed twice with saturated aqueous sodium chloride solution
6. dry with materialThe organic phase was dried with sodium sulfate
7. filtrationfiltered
8. customthe solvent was removed in vacuo
9. dissolutionThe residue was dissolved in 2N aqueous hydrochloric acid
10. customThe hydrochloric acid was removed in vacuo
11. dissolutionthe residue was dissolved in acetonitrile
12. additionadded to water