Diiodomethane → HCID 89924119, compound

Participants

Reaction Steps

Isopentyl nitrite (192 μl; 1.43 mmol; 3.0 eq.) was added to a solution of tert-butyl 4-4-[2-(3-aminophenyl)pyrimidin-5-yl]-1H-pyrazol-1-ylpiperidine-1-carboxylate (intermediate 5, step 1, 200 mg; 0.48 mmol; 1.0 eq.), Copper(I) iodide (91 mg; 0.48 mmol; 1.0 eq.) and diiodomethane (193 μl; 2.38 mmol; 5.0 eq.) in dry THF (8.0 mL) and the reaction mixture was refluxed for 2 hours. The reaction mixture was filtered through a Celite pad and the filtrate was concentrated to dryness. Purification by flash chromatography (EtOAc:heptane, gradient from 20:80 to 50:50) afforded the title compound as a white solid (200 mg; 67%). 1H NMR (300 Mz, DMSO-d6) δ 9.17 (s, 2H), 8.71 (t, J=1.7 Hz, 1H), 8.56 (s, 1H), 8.40-8.37 (m, 1H), 8.15 (s, 1H), 7.90-7.86 (m, 1H), 7.35 (t, J=7.9 Hz, 1H), 4.48-4.38 (m, 1H), 4.08-4.03 (m, 2H), 2.95 (m, 2H), 2.08-2.05 (m, 2H), 1.87-1.73 (m, 2H), 1.43 (s, 9H). HPLC (Condition A): Rt 5.47 min (purity 91.0%). MS (ESI+): 532.4

Provenance & Evidence