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CAS号32137-19-2 3,4-二氟三氟甲苯 | CAS号80172-08-3 5-[2-chloro-6-f... | CAS号79945-22-5 3-[2-chloro-6-f...📜3,5-二氯-4-氟三氟甲苯 反应生成 3-氯-4,5-二氟三氟甲苯
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标题:
专利信息
专利号:EP-0289036-A1
优先权日:1987-04-30
标题:Preparation of 3-chloro-4,5-difluorobenzotrifluoride
发明人:MUNDHENKE RUDOLPH F; TANG DAVID Y
权利人:OCCIDENTAL CHEM CO
摘要:In the synthesis of 3-chloro-4,5-difluorobenzotrifluoride by reaction of KF with 3,5-dichloro-4-fluorobenzotrifluoride, the production of undesirable by-products, especially over-fluorinated materials such as trifluorobenzotrifluoride is minimized when the reaction is run at a temperature of 196° to 206° Celsius in the presence of N-methyl-2-pyrrolidone.