反应详情

温度

80 °C

32.7 ml (445 mmol) of thionyl chloride are added to a suspension of 88.0 g (366 mmol) of 3-(5-hydroxypyrimidin-2-yl)benzoic acid in 1.4 l of methanol, and the mixture is heated at 80° C. for 2 hours. 20 ml (276 mmol) of thionyl chloride and, after 2 hours, a further 10 ml (138 mmol) of thionyl chloride are then added. After each addition, the reaction mixture is stirred at 80° C. for 2 hours. The reaction mixture is concentrated to a volume of about 300 ml in vacuo. The resultant precipitate is filtered off and dried in vacuo: methyl 3-(5-hydroxypyrimidin-2-yl)benzoate as brownish crystals; m.p. 219-223° C., ESI 231 (M+H); HPLC: Rt=3.87 min (method C).

1. additionAfter each addition
2. concentrationThe reaction mixture is concentrated to a volume of about 300 ml in vacuo
3. filtrationThe resultant precipitate is filtered off
4. customdried in vacuo