反应详情

To a suspension of 2-[5-(3-nitro-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]propane-2-sulfonamide (Example 70, 200 mg, 0.409 mmol) in MeOH (10 mL) was added 3% Pt/0.6% V/C (53 mg, 0.008 mmol). The reaction was sealed, purged with hydrogen, and stirred under a hydrogen balloon at room temperature overnight. A small amount of starting material remained, so additional catalyst (50 mg) was added, and a fresh hydrogen balloon was placed on the reaction. After another 24 h at room temperature, the starting material had been consumed. The reaction was diluted with MeOH, gently heated to dissolve any precipitated product, and filtered through Celite. The filtrate was evaporated, and flash chromatography of the residue (dry load, 20-100% ethyl acetate in hexanes) afforded 2-[5-(3-amino-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]propane-2-sulfonamide (116 mg, 62%) as an off-white solid. MS ESI: [M+H]+ m/z 459.0. 1H NMR (500 MHz, DMSO-d6) δ 10.05 (s, 1H), 8.78 (d, J=4.9, 1H), 7.87 (s, 1H), 7.37 (s, 1H), 7.22 (d, J=4.9, 1H), 7.03 (s, 2H), 6.89 (s, 1H), 6.53 (t, J=1.7, 1H), 5.28 (s, 2H), 1.78 (s, 6H). rhSYK activity=+++

1. customThe reaction was sealed
2. custompurged with hydrogen
3. additionwas added
4. customa fresh hydrogen balloon was placed on the reaction
5. waitAfter another 24 h at room temperature
6. customthe starting material had been consumed
7. additionThe reaction was diluted with MeOH
8. temperaturegently heated
9. dissolutionto dissolve any precipitated product
10. filtrationfiltered through Celite
11. customThe filtrate was evaporated
12. dry with materialflash chromatography of the residue (dry load, 20-100% ethyl acetate in hexanes)