A mixture of (S)-1-(6-(2-(benzyloxy)pyridin-4-yl)-1-methyl-1H-pyrrolo[3,2-b]pyridin-5-yl)ethanamine hydrochloride (155 mg, 0.393 mmol) and (S)-4-(5-(1-aminoethyl)-1-methyl-1H-pyrrolo[3,2-b]pyridin-6-yl)pyridin-2-ol hydrochloride (120 mg, 0.393 mmol) along with 2,4-diamino-6-chloropyrimidine-5-carbonitrile (100 mg, 0.590 mmol) and N-ethyl-N-isopropylpropan-2-amine (0.205 mL, 1.18 mmol) were combined in acetonitrile (6 mL). The reaction mixture was heated in a microwave reactor at 120° C. for 2 hours and then concentrated. The residue was dissolved in MeOH (10 mL). Pd/C (10%, 700 mg) was added and the reaction mixture was maintained under an atmosphere of hydrogen for 30 minutes. The mixture was filtered through Celite and concentrated. The residue was taken up in DMF and purified by preparative HPLC (basic mode) eluting with 20-35% ACN in water. The fractions containing the desired product were combined and concentrated in vacuo to give the title compound (73 mg, 46%). 1H NMR (500 MHz, DMSO-d6) δ ppm 1.22-1.32 (m, 3 H), 3.80 (br s, 3 H), 5.58 (quin, J=6.71 Hz, 1 H), 6.31 (d, J=6.83 Hz, 1 H), 6.48 (br s, 2 H), 6.52-6.63 (m, 5 H), 6.66 (d, J=7.81 Hz, 1 H), 7.52 (d, J=6.35 Hz, 1 H), 7.72 (d, J=2.93 Hz, 1 H), 7.80 (s, 1 H); ESI-MS m/z [M+H]+ calc'd for C20H19N9O, 402; found 402.
