[Cl:1][C:2]1[N:3]=[C:4](Cl)[C:5]2[CH2:11][N:10]([C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[CH2:9][CH2:8][C:6]=2[N:7]=1.[N:20]1[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=1[CH2:26][CH2:27][NH2:28].CCOC(C)=O.O>CN(C=O)C>[C:15]([O:14][C:12]([N:10]1[CH2:9][CH2:8][C:6]2[N:7]=[C:2]([Cl:1])[N:3]=[C:4]([NH:28][CH2:27][CH2:26][C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][N:20]=3)[C:5]=2[CH2:11]1)=[O:13])([CH3:18])([CH3:17])[CH3:16]A solution of tert-butyl 2,4-dichloro-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate (100 mg, 0.329 mmol) and TEA (0.137 mL, 0.986 mmol) in DMF (1.5 mL) was treated with 2-(2-pyridyl)ethyl amine (40.2 mg, 0.329 mmol). The mixture was stirred overnight at room temperature. The reaction mixture was EtOAc (10 mL) and H2O (10 mL), and extracted with EtOAc (2×10 mL). The combined organic phases were washed with H2O (10 mL) and brine (10 mL), dried over Na2SO4, filtered, and concentrated in vacuo. The resulting residue was purified by gradient elution on silica gel (0 to 100% EtOAc in hexanes to afford the title compound as a pale yellow gum (96 mg, 75%). Data for G-1: 1H NMR (500 MHz, CDCl3) δ 8.524-8.64 (br m, 1H), 7.61-7.69 (br m, 1H), 7.15-7.24 (m, 2H), 6.67-6.89 (br m, 1H), 4.24 (s, 2H), 3.67 (br m, 2H), 3.08 (t, J=9.0 Hz, 2H), 2.75 (br s, 2H), 1.51 (s, 9H); LC/MS: rt=1.35 min, m/z (M+H)=390.1 found; 390.2 calcd.
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