反应详情

温度

100 °C

Compound [6] was prepared as follows. 3-oxazolo[4,5-b]pyridin-2-yl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine (138 mg), 1-(4-bromo-3-methoxy-phenyl)-4-methyl-piperazine (97 mg), bis(triphenylphosphine) palladium (II) chloride (50.1 mg) and sodium carbonate (50.5 mg) were weighed out and sealed in a tube. DME (3 ml) and water (0.3 ml) were added. Argon was bubbled in the resulting mixture for 10 minutes then it was stirred at 100° C. for 1 hour. After cooling, the reaction mixture was diluted with ethyl acetate (5 ml), filtered, and purified by flash chromatography on silica gel eluting with 0 to 5% methanol in dichloromethane/ethyl acetate (1/1) then 5% methanolic ammonia 7N in dichloromethane/ethyl acetate (1/1). The solvent was evaporated to dryness and the product was triturated in acetonitrile (4 ml), collected by filtration, washed with Acetonitrile and dried under vacuum at 40° C., to give 5-[2-methoxy-4-(4-methylpiperazin-1-yl)phenyl]-3-oxazolo[4,5-b]pyridin-2-yl-pyridin-2-amine (78 mg). NMR Spectrum: (CDCl3) 2.40 (s, 3H), 2.61-2.69 (m, 4H), 3.27-3.36 (m, 4H), 3.85 (s, 3H), 6.58 (d, 1H), 6.62 (dd, 1H), 6.91 (bs, 2H), 7.25 (d, 1H), 7.30 (dd, 1H), 7.85 (dd, 1H), 8.46 (d, 1H), 8.47 (d, 1H), 8.56 (dd, 1H); Mass spectrum: M+H+ 417. There was no deprotection step.

1. customsealed in a tube
2. customArgon was bubbled in the resulting mixture for 10 minutes
3. temperatureAfter cooling
4. additionthe reaction mixture was diluted with ethyl acetate (5 ml)
5. filtrationfiltered
6. custompurified by flash chromatography on silica gel eluting with 0 to 5% methanol in dichloromethane/ethyl acetate (1/1)
7. customThe solvent was evaporated to dryness
8. customthe product was triturated in acetonitrile (4 ml)
9. filtrationcollected by filtration
10. washwashed with Acetonitrile
11. customdried under vacuum at 40° C.