1-Methylpiperazine → (R)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(7-(2-hydroxy-3-(4-methylpiperazin-1-yl)propoxy)-6-methoxyquinazolin-4-yloxy)phenyl)urea

Participants

Reaction Steps

A stirred solution of (R)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(6-methoxy-7-(oxiran-2-ylmethoxy)quinazolin-4-yloxy)phenyl)urea from the previous step (25 mg, 0.0495 mmol) and N-methylpiperazine (10 mg, 0.0998 mmol) in dry N,N-dimethylformamide (1 mL) was heated at 70° C. for 15 h. Concentration under reduced pressure gave a residue that was triturated with diethyl ether and further purified via silica gel chromatography eluting with 10% methanol in dichloromethane to afford (R)-1-(5-tert-butylisoxazol-3-yl)-3-(3-(7-(2-hydroxy-3-(4-methylpiperazin-1-yl)propoxy)-6-methoxyquinazolin-4-yloxy)phenyl)urea as a colorless solid (5 mg, 17%). 1H NMR (300 MHz, CDCl3) δ 9.40 (brs, 1H), 8.62 (s, 1H), 8.30 (brs, 1H), 7.64 (s, 1H), 7.52 (s, 1H), 7.27-7.39 (m, 3H), 7.00 (m, 1H), 5.96 (s, 1H), 4.20-4.28 (m, 3H), 4.02 (s, 3H), 2.00-2.80 (m, 14H), 1.29 (s, 9H); LC-MS (ESI) m/z 606 (M+H)+.

Provenance & Evidence