The present invention refers to a process for the preparation of chloromethyl 2,2,2-trifluoro-1-(trifluoromethyl) ethyl ether (sevochlorane), which consists of reacting hexafluoroisopropanol with: a formaldehyde equivalent selected between paraformaldehyde or 1,3,5-trioxane, a chlorinating agent selected from the group consisting of oxalyl chloride, phosphorus trichloride, phosphorus pentachloride, phosphorus oxychloride, sulfuryl chloride and thionyl chloride, and a strong acid selected from the group consisting of concentrated or fuming sulfuric acid. Said process provides sevochlorane in high purity and yield, which can be converted to sevoflurane by known means.
本发明涉及一种制备
氯甲基2,2,2-三
氟-1-(三
氟甲基)
乙醚(sevochlorane)的方法,包括将
六氟异丙醇与以下物质反应:选择自
聚甲醛或
1,3,5-三噁烷的
甲醛等效物、从
草酰氯、
三氯化磷、
五氯化磷、
氯氧化
磷、亚
磺酰氯和
硫酰氯组成的
氯化试剂,以及从浓
硫酸或烟雾
硫酸组成的强酸。该方法提供高纯度和高收率的sevochlorane,可以通过已知手段转化为sevoflurane。