4-[1-(3-Cyano-5-trifluoromethyl-phenylcarbamoyl)-1H-indol-5-yloxy]-5,8-dihydro-6H-pyrido[3,4-d]pyrimidine-7-carboxylic acid tert-butyl ester → Ammonium Hydroxide

Participants

Reaction Steps

A solution of 4-[1-(3-cyano-5-trifluoromethyl-phenylcarbamoyl)-1H-indol-5-yloxy]-5,8-dihydro-6H-pyrido[3,4-d]pyrimidine-7-carboxylic acid tert-butyl ester (132 mg, 0.28 mmol) in DCM (2 mL) and TFA (2 mL) is stirred at room temperature for 2 h. The reaction is concentrated in vacuo and purified via semi-prep HPLC(C18; 10-100% I/H2O with 0.1% NH4OH) to give the title compound. MS (ESI) m/z 479.0 (M+1); 1H NMR (400 MHz, DMSO-d6) δ ppm 8.38-8.42 (m, 2 H), 8.35 (s, 1 H), 8.28 (d, J=8.8 Hz, 1 H), 8.07-8.12 (m, 2 H), 7.47 (d, J=2.3 Hz, 1 H), 7.14 (dd, J=8.8, 2.3 Hz, 1 H), 6.83 (d, J=3.3 Hz, 1 H), 3.85 (s, 2 H), 3.06 (t, J=5.8 Hz, 2 H), 2.74 (t, J=5.7 Hz, 2 H).

Provenance & Evidence