Dichloromethane → 8-Bromo-2-chloroquinazoline

Beteiligte Stoffe

Reaktionsschritte

To a stirred mixture of 8-bromo-2-chloroquinazolin-4-amine (12.93 g, 50 mmol) in THF (500 mL) was added isoamyl nitrite (23.43 g, 200 mmol) over 3 hours and 40 mins at 60° C. The mixture was stirred for another 5 hours. TLC (PE:EA, 1:1) showed reaction complete. After cooling to room temperature, the solvent was stripped and the residue was taken into DCM (300 mL). The organic layer was washed with brine (100 mL), water (100 mL), then dried over anhydrous Na2SO4 and purified by chromatography (DCM:PE, 1:1) to give the title compound as a yellow solid (8.21 g, 67%). 1HNMR (DMSO-d6, 400 MHz): δ 9.66 (s, 1H), 8.45 (dd, J=0.8, 7.6 Hz, 1H), 8.26 (dd, J=0.8, 8.0 Hz, 7.73 (dd, J=7.6, 8.0 Hz, 1H).

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