Sodium hydride → 3-(7-Ethoxy-6-methoxyquinazolin-4-ylthio)aniline

Participants

Reaction Steps

To a stirred slurry of sodium hydride (350 mg of a 60% dispersion in mineral oil, 8.80 mmol) in anhydrous THF (50 mL) at rt, was added 3-aminobenzenethiol (1.00 g, 9.17 mmol). After stirring for 30 mins, 4-chloro-7-ethoxy-6-methoxyquinazoline (prepared as described in Example 6A Steps 1 through 5) (1.91 g, 8.03 mmol) was added and the reaction mixture was stirred at rt for a further 4 h. The mixture was concentrated under reduced pressure and the resulting solid was washed with water (three times) then ethyl acetate (three times) to afford 3-(7-ethoxy-6-methoxyquinazolin-4-ylthio)aniline (2.36 g, 90%) as yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 8.69 (s, 1H), 7.30-7.31 (m, 2H), 7.13 (m, 1H), 6.80 (s, 1H), 6.72-6.74 (m, 2H), 5.31 (brs, 2H), 4.25 (q, J=7 Hz, 2H), 3.97 (s, 3H), 1.43 (t, J=7 Hz, 3H); LC-MS (ESI) m/z 328 (M+H)+.

Provenance & Evidence