Isopropanol → (R)-7-(4-(4-isopropylpiperazin-1-yl)phenyl)-3-methyl-5-(tetrahydrofuran-3-ylamino)pyrido[4,3-d]pyrimidin-4(3H)-one

Participants

Reaction Conditions

Reaction Steps

A mixture of (R)-7-chloro-3-methyl-5-(tetrahydrofuran-3-ylamino)pyrido[4,3-d]pyrimidin-4(3H)-one (15 mg, 0.053 mmol), 1-methyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperazine (19.4 mg, 0.059 mmol), Pd(PPh3)4 (6.1 mg, 0.0053 mmol), K2CO3 (22 mg, 0.16 mmol), 2-propanol (3 mL) and H2O (1 mL) was stirred at 90° C. overnight. The reaction mixture was cooled to room temperature and worked-up. The residue was purified on slilica gel flash column chromatography (eluent: 0-10% methanol in dichloromethane) to afford (R)-7-(4-(4-isopropylpiperazin-1-yl)phenyl)-3-methyl-5-(tetrahydrofuran-3-ylamino)pyrido[4,3-d]pyrimidin-4(3H)-one as a slightly yellow solid. 1H NMR (CDCl3) δ (ppm) 8.80 (d, 1H), 8.04 (d, 2H), 8.00 (s, 1H), 7.10 (s, 1H), 6.98 (d, 2H), 4.92-4.84 (m, 1H), 4.22 (dd, 1H), 4.06-3.99 (m, 1H), 3.95-3.89 (m, 1H), 3.80 (dd, 1H), 3.51 (s, 3H), 3.34-3.31 (m, 4H), 3.77-3.68 (m, 5H), 2.46-2.36 (m, 1H), 2.06-1.96 (m, 1H), 1.10 (d, 6H); HPLC-MS calculated C25H32N6O2 (M+H+): 449.27, found: 449.20.

Provenance & Evidence