反应详情

46.5 g of 2-trifluoromethyl-4-chloro-quinazoline is added, while stirring, to a mixture of 97 g of potassiumthiocyanate and 200 ml of acetic acid. The reaction mixture is stirred for 2 hours at room temperature, the resultant light-yellow precipitate is drawn off, consecutively washed with a small amount of acetic acid and water and subsequently dried in air. The 2-trifluoromethyl-4-thiocyano-quinazoline thus obtained has a melting point of 134°-136°C.

1. washconsecutively washed with a small amount of acetic acid and water
2. customsubsequently dried in air