Sodium hydride → 1-(5-Tert-butylisoxazol-3-yl)-3-(3-(7-methoxy-6-(3-(methylsulfonyl)propoxy)quinazolin-4-ylthio)phenyl)urea

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Reaction Conditions

Reaction Steps

To a suspension of sodium hydride (11 mg, 0.44 mmol) in anhydrous tetrahydrofuran (2 mL) cooled to 0° C., was added compound 1-(5-tert-butylisoxazol-3-yl)-3-(3-mercaptophenyl)urea described in Example 44A (117 mg, 0.40 mmol) as a solution in tetrahydrofuran (1 mL) and the mixture stirred at 0° C. for 30 minutes. To this suspension 4-chloro-7-methoxy-6-(3-(methylsulfonyl)propoxy)quinazoline from Example 41B Step 1 (133 mg, 0.40 mmol) was added and the resulting mixture was stirred at 0° C. and slowly allowed to reach room temperature. After stirring for additional 1 h, the mixture was taken up in ethyl acetate/water and extracted. The combined organic layers were dried (MgSO4) and concentrated under reduced pressure. The residue was purified by preparative HPLC (Phenomenex phenylhexyl reverse phase column) to afford 1-(5-tert-butylisoxazol-3-yl)-3-(3-(7-methoxy-6-(3-(methylsulfonyl)propoxy)quinazolin-4-ylthio)phenyl)urea (10.30 mg, 4%) as a solid. 1H NMR (300 MHz, DMSO-d6) δ 9.73 (bs, 1H), 9.19 (bs, 1H), 8.70 (s, 1H), 7.85 (s, 1H), 7.53-7.27 (m, 5H), 6.49 (s, 1H), 4.32 (bs, 2H), 4.01 (s, 3H), 3.35 (2H), 3.07 (s, 3H), 2.28 (bs, 2H), 1.28 (s, 9H); LC-MS (ESI) m/z 586 (M+H)+.

Provenance & Evidence