Phosphorus oxychloride → 4-Chloro-2-(2-ethylsulfanylphenyl)-7-trifluoromethylquinazoline

Participants

Reaction Conditions

Reaction Steps

A mixture of 1.29 g of 2-(2-ethylsulfanylphenyl)-7-trifluoromethyl-3H-quinazolin-4-one, 0.38 ml of phosphorus oxychloride, 523 mg of N,N-diisopropylethylamine and 20 ml of toluene was stirred at 90° C. for 2 hours. A saturated aqueous sodium bicarbonate solution was added to the cooled reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and dried over anhydrous magnesium sulfate, then concentrated under reduced pressure to obtain 1.23 g of 4-chloro-2-(2-ethylsulfanylphenyl)-7-trifluoromethylquinazoline (Compound of Present Invention 4).

Provenance & Evidence