Diisopropylethylamine → 1-(3-tert-butyl-1-isobutyl-1H-pyrazol-5-yl)-3-(3-(6,7-dimethoxyquinazolin-4-yloxy)phenyl)urea

Participants

Reaction Steps

A stirred solution of phenyl 3-tert-butyl-1-isobutyl-1H-pyrazol-5-ylcarbamate (150 mg, 0.47 mmol), N,N-Diisopropylethylamine (80 mg, 0.62 mmol) and 3-(6,7-dimethoxyquinazolin-4-yloxy)aniline (prepared as described in Example 113A) (92 mg, 0.31 mmol) in THF (1.0 mL) was heated at 60° C. for 15 h. After cooling to rt, the reaction solution was partitioned between dichloromethane and a saturated aqueous solution of sodium carbonate. The organic phase was separated and concentrated under reduced pressure. The crude product was purified via silica gel column chromatography (eluting with a gradient of 40:1 to 20:1 dichloromethane: methanol) then reverse-phase preparative HPLC to afford 1-(3-tert-butyl-1-isobutyl-1H-pyrazol-5-yl)-3-(3-(6,7-dimethoxyquinazolin-4-yloxy)phenyl)urea (60 mg, 38%) as a pale yellow solid. 1H NMR (400 MHz, DMSO-d6) δ9.09 (s, 1H), 8.57 (s, 1H), 8.49 (s, 1H), 7.61 (m, 1H), 7.57 (m, 1H), 7.37-7.41 (m, 2H), 7.24 (m, 1H), 6.94 (m, 1H), 6.01 (s, 1H), 4.00 (s, 3H), 3.99 (s, 3H), 3.71 (d, J=7.6 Hz, 2H), 2.07 (m, 1H), 1.20 (s, 9H), 0.83 (d, J=6.4 Hz, 6H); LC-MS (ESI) m/z 519 (M+H)+.

Provenance & Evidence