反应详情

温度

0 °C

A mixture of 3-methyl-isoxazole-4-carboxylic acid (7.3 mg, 0.057 mmol) in dichloromethane (1.0 mL) cooled to 0° C. was treated with triphenylphosphine (17 mg, 0.063 mmol), and N-chlorosuccinimide (10 mg, 0.074 mmol). This mixture was stirred at 0° C. for 15 min and at 25° C. for 20 min. At this time, the reaction was treated with 3-cyclopropylmethyl-1-(2-fluoro-benzyl)-8-(4-methylamino-benzyl)-3,7-dihydro-purine-2,6-dione (50 mg, 0.11 mmol). The reaction was then stirred at 25° C. for 18 h. At this time, the reaction was diluted with dichloromethane (50 mL) and was washed with a saturated aqueous sodium bicarbonate solution (1×10 mL). The organics were dried over magnesium sulfate, filtered, and concentrated in vacuo. The resulting residue was purified by HPLC (15–60% acetonitrile/water (0.075% trifluoroacetic acid in both solvents) over 40 min). Fractions with the desired product were combined and concentrated in vacuo. The resulting residue was diluted with dichloromethane (100 mL) and was washed with a saturated aqueous sodium bicarbonate solution (25 mL). The aqueous layer was re-extracted with dichloromethane (1×50 mL). The combined organics were dried over magnesium sulfate, filtered, and concentrated in vacuo. The resulting solid was dried in vacuo for 24 h to afford 3-methyl-isoxazole-4-carboxylic acid {4-[3-cyclopropylmethyl-1-(2-fluoro-benzyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-ylmethyl]-phenyl}-methyl-amide (6.8 mg, 21.8%) as an off-white solid: EI-HRMS m/e calcd for C29H27N6O4 (M+) 542.2078, found 542.2077.

1. stirringThe reaction was then stirred at 25° C. for 18 h
2. washwas washed with a saturated aqueous sodium bicarbonate solution (1×10 mL)
3. dry with materialThe organics were dried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe resulting residue was purified by HPLC (15–60% acetonitrile/water (0.075% trifluoroacetic acid in both solvents) over 40 min)
7. concentrationconcentrated in vacuo
8. additionThe resulting residue was diluted with dichloromethane (100 mL)
9. washwas washed with a saturated aqueous sodium bicarbonate solution (25 mL)
10. extractionThe aqueous layer was re-extracted with dichloromethane (1×50 mL)
11. dry with materialThe combined organics were dried over magnesium sulfate
12. filtrationfiltered
13. concentrationconcentrated in vacuo
14. customThe resulting solid was dried in vacuo for 24 h