Sodium Bicarbonate → HCID 66558476, compound

Participants

Reaction Steps

A mixture of tert-butyl 4-(6-chloropyrido[3,2-d]pyrimidin-4-ylamino)piperidine-1-carboxylate (Intermediate 24) (0.050 g, 0.137 mmol), N-(2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-yl)pyridine-3-yl)-2,4-difluorobenzenesulfonamide (Intermediate 3) (0.065 g, 0.151 mmol), PdCl2(dppf)-CH2Cl2Adduct (5.61 mg, 6.87 μmol) and 1 N aq. sodium bicarbonate (0.275 ml, 0.275 mmol) in dioxane (1.40 ml) subjected to microwave irradiation for 1 hour at 110° C. After cooling to room temperature, the reaction mixture was filtered through Celite and washed with CH2Cl2. The filtrate was concentrated in vacuo. The residue was purified by prep TLC (Hex:EtOAc=1:2) to give tert-butyl 4-(6-(6-chloro-5-(2,4-difluorophenylsulfonamido)pyridin-3-yl)pyrido[3,2-d]pyrimidin-4-ylamino)piperidine-1-carboxylate (3.90 mg, 4.5%) as a yellow solid. 1H-NMR (CDCl3, Varian 400 MHz) δ 1.48 (9H, s), 1.55-1.72 (2H, m), 2.05-2.22 (2H, m), 2.92-3.12 (2H, m), 4.02-4.25 (2H, m), 4.30-4.48 (1H, m), 6.90-7.04 (2H, m), 7.14 (1H, J=8.0 Hz), 7.80-7.92 (1H, m), 8.07 (1H, d, J=8.8 Hz), 8.22 (1H, d, J=8.8 Hz), 8.69 (1H, s), 8.70 (1H, br s), 8.79 (1H, br s). m/z=632.2 [M+1]+.

Provenance & Evidence