Sodium hydride → N-(5-tert-butylisoxazol-3-yl)-5-(6,7-dihydro-5H-pyrrolo[3,4-d]pyrimidin-4-yloxy)-1H-indole-1-carboxamide

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Tert-butyl 4-(1H-indol-5-yloxy)-5H-pyrrolo[3,4-d]pyrimidine-6(7H)-carboxylate (127 mg, 0.360 mmol) is dissolved in THF (8 mL), flushed with nitrogen and cooled to 0° C. Sodium hydride (23 mg, 0.575 mmol, 60% in mineral oil) is added and the mixture is stirred for 10 minutes. Phenyl 5-tert-butylisoxazol-3-ylcarbamate (140 mg, 0.538 mmol) is added neat and the reaction is allowed to stir at room temperature overnight. The reaction is cooled in an ice bath and quenched with a saturated solution of ammonium chloride (100 mL). The mixture is then diluted with ethyl acetate and the product is extracted (2×100 mL EtOAc). The organic layers are combined, dried and concentrated to a brown oil that is dissolved in 10 mL of DCM and cooled in an ice bath and 10 mL of TFA is added. Following completion of the reaction the DCM and TFA are removed and ethyl acetate is added to the residue along with ammonium hydroxide to quench the remaining TFA. The mixture is diluted with water and extracted with ethyl acetate (2×50 mL). The organic layers are removed, dried, and concentrated. The residue is absorbed onto silica and separated via FCC (0-6% Methanol/DCM) to obtain N-(5-tert-butylisoxazol-3-yl)-5-(6,7-dihydro-5H-pyrrolo[3,4-d]pyrimidin-4-yloxy)-1H-indole-1-carboxamide. MS (ESI) m/z 419.2 (M+1); 1H NMR (400 MHz, DMSO-d6) δ ppm 8.56 (s, 1H) 8.29 (d, J=8.84 Hz, 1H) 8.17 (d, J=3.79 Hz, 1H) 7.47 (d, J=2.27 Hz, 1H) 7.15 (dd, J=8.97, 2.40 Hz, 1H) 6.76 (d, J=3.28 Hz, 1H) 6.68 (s, 1H) 4.07-4.14 (m, 4H) 1.34 (s, 9H).

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