Phosphorus oxychloride → Methyl 2-amino-4-chloroquinazoline-7-carboxylate

Participants

Reaction Steps

A solution of methyl 2-amino-4-oxo-3,4-dihydroquinazoline-7-carboxylate (500 mg, 2.28 mmol) and phosphoryl chloride (4 mL, 42.9 mmol) was stirred at 110° C. for 6 h. The starting material was consumed and the reaction mixture was concentrated to give the crude product (500 mg, 92.2%) as an oil. 1H NMR (300 MHz, DMSO) δ 3.9 (s, 3H), 7.79 (dd, 1H), 8.05 (d, 1H), 8.13 (d, 1H); Analytic LCMS (M+H)+: m/z=238.0.

Provenance & Evidence