1-Methylpiperazine → 1-(5-Tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(2-(4-methylpiperazin-1-yl)ethoxy)quinazolin-4-yloxy)phenyl)urea

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(5-tert-butyl-isoxazol-3-yl)-3-{3-[7-(2-chloro-ethoxy)-6-methoxy-quinazolin-4-yloxy]-phenyl}-urea from Example 35B (225 mg, 0.439 mmol) in DMF (3 mL) was added N-methyl piperazine (0.146 mL, 1.317 mmol) followed by diisopropyl ethylamine (0.229 mL, 1.317 mmol) and tetrabutyl ammonium iodide (162.15 mg, 0.439 mmol). The reaction mixture was heated at 60° C. for 2 days. Formation of the product was determined by LCMS. The crude reaction mixture was purified by preparative HPLC (phenomenex phenylhexyl reverse phase column eluted with gradient of solvent A=0.05% HOAc/H2O and solvent B=0.05% HOAc/CH3CN) to afford 1-(5-tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(2-(4-methylpiperazin-1-yl)ethoxy)quinazolin-4-yloxy)phenyl)urea (21 mg, 8%) as a white solid. 1H NMR (300 MHz, DMSO-d6) δ 9.80 (s, 1H), 9.32 (s, 1H), 8.55 (s, 1H), 7.55 (d, 2H), 7.40 (m, 2H), 7.25 (s, 1H), 6.98 (m, 1H), 6.48 (s, 1H), 4.30 (m, 2H), 4.00 (s, 3H), 2.82-2.25 (m, 10H), 2.15 (s, 3H), 1.28 (s, 9H); LC-MS (ESI) m/z 576 (M+H)+.

Provenance & Evidence