Acetic Acid → HCID 66876498, compound

Participants

Reaction Steps

To a solution of 1-(3-tert-butylisoxazol-5-yl)-3-(3-(6-methoxy-7-(piperidin-4-ylmethoxy)quinazolin-4-yloxy)phenyl)urea (82.5 mg, 0.15 mmol) in 1,2-dichloroethane/N,N′-dimethylacetamide (1.3 mL, 3:1) was added 37% formaldehyde (24 mL, 0.3 mmol) and acetic acid (10 μL, 0.18 mmol). The mixture was stirred at room temperature for 20 minutes. Sodium triacetoxyborohydride (48 mg, 0.23 mmol) was added in portions and the resulting mixture stirred at room temperature for 2 h. Ethyl acetate and 1N sodium hydroxide were added to the mixture, the organic layer was separated and the water phase extracted three times. The organics were combined, dried (MgSO4) and concentrated under reduced pressure. The crude material was purified by preparative HPLC (Phenomenex phenylhexyl reverse phase column) to afford 1-(3-tert-butylisoxazol-5-yl)-3-(3-(6-methoxy-7-((1-methylpiperidin-4-yl)methoxy)quinazolin-4-yloxy)phenyl)urea (57 mg, 68%) as a white solid. 1H NMR (300 MHz, DMSO-d6) δ 9.75 (bs, 1H), 9.21 (bs, 1H), 8.55 (s, 1H), 7.57 (d, 2H), 7.37-7.26 (m, 3H), 6.96 (d, 1H), 6.47 (s, 1H), 4.07-3.99 (m, 5H), 2.83-2.79 (m. 2H), 2.17 (s, 3H), 1.93-1.76 (m, 5H), 1.39-1.35 (m, 2H), 1.27 (s, 9H); LC-MS (ESI) m/z 561 (M+H)+.

Provenance & Evidence