反应详情

4-[2-(5-{2-[3-(3-tert-Butyl-isoxazol-5-yl)-ureidomethyl]-4-fluorophenoxy}-indazol-1-yl)-ethyl]-piperazine-1-carboxylic acid tert-butyl ester (0.056 g, 0.088 mmol) was treated with TFA/CH2Cl2 (1:1, 2 mL) and stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure and azeotroped with toluene. The residue was diluted with ethyl acetate (40 mL) and washed with 1N NaOH and brine. The solution was concentrated under reduced pressure to afford 0.038 g of the product (80% yield). MS (ESI+) m/z 536 (M+1) detected; 1H NMR (400 mHz, CDCl3) δ 7.81 (s, 1H), 7.35 (d, 1H), 7.15 (dd, 1H), 7.08 (s, 1H), 7.05 (d, 1H), 6.88 (m, 1H), 6.76 (m, 1H), 6.28 (m, 1H), 5.99 (s, 1H), 4.46 (m, 4H), 2.86 (m, 2H), 2.79 (m, 4H), 2.43 (m, 4H), 1.26 (s, 9H).

1. concentrationThe mixture was concentrated under reduced pressure
2. customazeotroped with toluene
3. additionThe residue was diluted with ethyl acetate (40 mL)
4. washwashed with 1N NaOH and brine
5. concentrationThe solution was concentrated under reduced pressure