反应详情

35.7 mg of sodium hydride and then, after 10 minutes of stirring, 0.135 ml de of benzoyl chloride are added, under an argon atmosphere, to a solution of 300 mg of (S)-2-morpholin-4-yl-8-trifluoromethyl-6,7,8,9-tetrahydropyrimido[1,2-a]pyrimidin-4-one (Example 1e) in 3 ml of tetrahydrofuran. After stirring for six hours at ambient temperature, a saturated solution of sodium bicarbonate and ethyl acetate are added to the reaction mixture. The organic phase is separated and then successively washed with a saturated solution of sodium chloride, dried over magnesium sulphate, filtered and concentrated under reduced pressure. The residue obtained is purified by silica chromatography (eluent: CH2Cl2) so as to give 74 mg of (S)-9-benzoyl-2-morpholin-4-yl-8-trifluoromethyl-6,7,8,9-tetrahydropyrimido[1,2-a]pyrimidin-4-one, in the form of a white solid, the characteristics of which are the following:

1. customThe organic phase is separated
2. washsuccessively washed with a saturated solution of sodium chloride
3. dry with materialdried over magnesium sulphate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customThe residue obtained
7. customis purified by silica chromatography (eluent: CH2Cl2) so as