反应详情

温度

100 °C

3-(3-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-4-(tetrahydro-2H-pyran-2-yl)-4H-1,2,4-triazole (See Example 2.C) (0.465 g, 1.259 mmol), 7-bromo-3,4-dihydropyrazino[2,3-b]pyrazin-2(1H)-one trifluoroacetate (0.432 g, 1.259 mmol), [1,1′-bis(diphenylphosphino)-ferrocene]dichloropalladium(II), complex with dichloromethane (1:1) (0.103 g, 0.126 mmol), sodium carbonate (1 M in water, 3.78 mL, 3.78 mmol), 1,4-dioxane (2.5 mL) and isopropanol (1 mL) were combined in a sealable vessel with a stirbar. The system was purged with nitrogen. The resulting mixture was sealed, stirred vigorously and heated at 100° C. for 70 min. The resulting mixture was diluted with water and dichloromethane and filtered through a fritted funnel. Solids were washed with 20% methanol in dichloromethane. Filtrate and wash were combined and the solvent was removed under reduced pressure. The residue was triturated with acetonitrile. Water was added. Solids were collected by vacuum filtration and washed thoroughly with water and diethyl ether. Solids were washed with 20% methanol in dichloromethane. Filtrate and wash were combined and the solvent was removed under reduced pressure. The residue was taken up in hot DMSO and methanol, filtered and purified using reverse-phase preparatory HPLC (20-65% acetonitrile+0.1% TFA in water+0.1% TFA, over 30 min). Fractions containing the desired product were combined, neutralized with saturated aqueous sodium bicarbonate and concentrated nearly to dryness under reduced pressure. Solids were collected by vacuum filtration, washed with water and dried under high vacuum to give the desired product (0.072 g, 0.184 mmol, 15% yield) as an off-white solid. MS (ESI) m/z 392.1 [M+1]+.

1. customThe system was purged with nitrogen
2. customThe resulting mixture was sealed
3. additionThe resulting mixture was diluted with water and dichloromethane
4. filtrationfiltered through a fritted funnel
5. washSolids were washed with 20% methanol in dichloromethane
6. washFiltrate and wash
7. customthe solvent was removed under reduced pressure
8. customThe residue was triturated with acetonitrile
9. additionWater was added
10. filtrationSolids were collected by vacuum filtration
11. washwashed thoroughly with water and diethyl ether
12. washSolids were washed with 20% methanol in dichloromethane
13. washFiltrate and wash
14. customthe solvent was removed under reduced pressure
15. filtrationmethanol, filtered
16. custompurified
17. customreverse-phase preparatory HPLC (20-65% acetonitrile+0.1% TFA in water+0.1% TFA, over 30 min)
18. additionFractions containing the desired product
19. concentrationconcentrated nearly to dryness under reduced pressure
20. filtrationSolids were collected by vacuum filtration
21. washwashed with water
22. customdried under high vacuum