Diisopropylethylamine → ethyl 2-(3-tert-butyl-5-{3-[3-(6,7-dimethoxyquinazolin-4-ylthio)phenyl]ureido}-1H-pyrazol-1-yl)acetate

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Reaction Steps

Using the procedure described in Example 159B, using ethyl 2-[3-tert-butyl-5-(phenoxycarbonylamino)-1H-pyrazol-1-yl]acetate described in Example 166A (0.138 g, 0.4 mmol), 3-(6,7-dimethoxyquinazolin-4-ylthio)aniline from Example 115B (0.125 g, 0.4 mmol), and N,N-diisopropylethylamine (0.5 mL) in THF (6 mL) at 50° C. for 7 hours, to afford ethyl 2-(3-tert-butyl-5-{3-[3-(6,7-dimethoxyquinazolin-4-ylthio)phenyl]ureido}-1H-pyrazol-1-yl)acetate as solid (133 mg, 59%). 1H NMR (300 MHz, DMSO-d6) δ 8.98 (s, 1H), 8.70 (s, 1H), 8.60 (m, 1H), 7.83 (s, 1H), 7.51 (d, 1H), 7.43 (t, 1H), 7.35 (s, 1H), 7.34 (s, 1H), 7.25 (d, 1H), 6.12 (s, 1H), 4.85 (s, 2H), 4.15 (q, 2H), 3.99 (s, 6H), 1.20 (s and t, 12H); LC-MS (ESI) m/z 565 (M+H)+.

Provenance & Evidence