反应详情

温度

25 °C

Ten parts of 2-(4-chloro-2-fluorophenyl)-1,2,4,5,6,7-hexahydro-3H-indazol-3-one and 50 parts of chlorobenzene were charged to a Hastalloy C-lined shaker tube. The vessel was closed, charged with 10 parts of phosgene from a pressurized cylinder, and heated to 130° with constant shaking for 4 hours. The vessel was cooled to 25° C, vented, opened and discharged. The product mixture was evaporated under reduced pressure to give 10.1 parts of 2-(4-chloro-2-fluorophenyl)-3-chloro,4,5,6,7-tetrahydro-2H-indazole, m.p. 82°-85°. (90.7% pure as determined by gas chromatography).

1. customThe vessel was closed
2. temperatureheated to 130°
3. customThe product mixture was evaporated under reduced pressure