反应详情

TFA (1 mL, 13.0 mmol) is added to a solution of 4-[1-(2-fluoro-5-trifluoromethyl-phenylcarbamoyl)-1H-indol-5-yloxy]-5,8-dihydro-6H-pyrido[3,4-d]pyrimidine-7-carboxylic acid tert-butyl ester (0.125 g, 0.219 mmol) and DCM (2.5 mL). After 1 h the solution is concentrated in vacuo. The residue is taken up in MeOH and neutralized to pH 7 by the addition of NH4OH and the solution is separated via semi-prep HPLC (C18; 10-100% I/H2O with 0.1% NH4OH) to give 5-(5,6,7,8-Tetrahydro-pyrido[3,4-d]pyrimidin-4-yloxy)-indole-1-carboxylic acid (2-fluoro-5-trifluoromethyl-phenyl)-amide. MS (ESI) m/z 472.1 (M+1); 1H NMR (400 MHz, DMSO-d6) δ ppm 8.40 (s, 1 H), 8.25 (d, J=8.8 Hz, 1 H), 8.07 (d, J=3.8 Hz, 1 H), 8.03-8.07 (m, 1 H), 7.67-7.75 (m, 1 H), 7.56-7.64 (m, 1 H), 7.45 (d, J=2.5 Hz, 1 H), 7.11 (dd, J=9.0, 2.4 Hz, 1 H), 6.79 (d, J=3.5 Hz, 1 H), 3.83 (s, 2 H), 3.04 (t, J=5.8 Hz, 2 H), 2.73 (t, J=5.6 Hz, 2 H).

1. concentrationAfter 1 h the solution is concentrated in vacuo
2. additionThe residue is taken up in MeOH and neutralized to pH 7 by the addition of NH4OH
3. customthe solution is separated via semi-prep HPLC (C18; 10-100% I/H2O with 0.1% NH4OH)