Enflurane has practically all the same characteristics as halothane and is used in the same situations. It is poorly absorbed. It is also prescribed under the name ethrane.

Isoflurane: Isoflurane, 2-chloro-2-(difluoromethoxy)-1,1,1-trifluorethane (1.1.8), is synthesized from 2,2,2-trifluoroethanol. 2,2,2-Trifluoroethanol is first methylated by dimethylsulfate. The resulting methyl ether (1.1.5) undergoes chlorination by molecular chlorine to give 2-(dichloromethoxy)-1,1,1-trifluoroethane (1.1.6). In the subsequent interaction (1.1.6) with hydrogen fluoride in the presence of antimony(V) chloride, chlorine atoms are ultimately replaced by fluorine atoms. The resulting ether (1.1.7) again undergoes chlorination by molecular chlorine to give isoflurane [6,7].

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