反应详情

A solution of [5-(3-tert-butoxycarbonylaminoprop-1-yl)-2H-pyrazol-3-yl]-(2-phenyl-quinazolin-4-yl)-amine (III-80) (250 mg, 0.56 mmol), in dichloromethane (3 mL) at 0° C. was treated with TFA (2 mL). The mixture was warmed to room temperature then concentrated in vacuo. The residue was triturated and concentrated from dichloromethane (3×5 mL) and ether, then triturated with dichloromethane to crystallize the TFA salt. The resulting solid was collected by filtration and dissolved in a mixture of ethanol (3 mL) and water (3 mL). Potassium carbonate was added in portions to achieve pH 8 then the mixture allowed to crystallize. The product was collected by filtration and dried at 80° C. under vacuum to afford III-79 as an off-white powder (122 mg, 63%): mp 205-207° C.; 1H NMR (DMSO) δ 1.68-1.83 (2H, m), 2.65-2.80 (4H, m), 6.80 (1H, s), 7.50-7.60 (4H, m), 7.80-7.90 (2H, m), 8.45-8.53 (2H, m), 8.65 (1H, d), 10.45 (1H, br s); IR (solid) 1621, 1598, 1568, 1533, 1484, 1414, 1364, 1327, 1169, 1030, 951, 830, 776, 764, 705, 677; MS 345.3 (M+H)+.

1. concentrationthen concentrated in vacuo
2. customThe residue was triturated
3. concentrationconcentrated from dichloromethane (3×5 mL) and ether
4. customtriturated with dichloromethane
5. customto crystallize the TFA salt
6. filtrationThe resulting solid was collected by filtration
7. dissolutiondissolved in a mixture of ethanol (3 mL) and water (3 mL)
8. additionPotassium carbonate was added in portions
9. customto crystallize
10. filtrationThe product was collected by filtration
11. customdried at 80° C. under vacuum