Diisopropylethylamine mono(hydrogen fluoride) for nucleophilic fluorination of sensitive substrates: synthesis of sevoflurane
作者:Linas V Kudzma、Chialang G Huang、Ralph A Lessor、Leonid A Rozov、Syeda Afrin、Florida Kallashi、Conor McCutcheon、Keith Ramig
DOI:10.1016/s0022-1139(01)00396-7
日期:2001.9
fluoride) (7), is shown to be an effective and selective nucleophilic fluorinating reagent when applied to halogen-exchange reactions of chloromethyl ethers, in particular the conversion of 1,1,1,3,3,3-hexafluoroisopropyl chloromethyl ether (3) to the volatile anesthetic sevoflurane (1,1,1,3,3,3-hexafluoroisopropyl fluoromethyl ether). The amine portion of the reagent does not react with the starting
The fluoromethyl ether sevoflurane as a fluoride source in halogen-exchange reactions
作者:Leonid A. Rozov、Ralph A. Lessor、Linas V. Kudzma、Keith Ramig
DOI:10.1016/s0022-1139(97)00135-8
日期:1998.2
Fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl) ethyl ether (sevoflurane), fluoromethyl 1,1,2,3,3,3-hexafluoropropyl ether, and fluoromethyl 1,2,2,2-tetrafluoroethyl ether are found to be selective fluoride donors in some halogen-exchange reactions. For example, treatment of a mixture of a polychlorinated substrate and one equivalent of sevoflurane with a catalytic amount of antimony pentachloride gives a monofluorinated product and one equivalent of chloromethyl 2,2,2-trifluoro-1-(trifluoromethyl) ethyl ether as by-product. (C) 1998 Elsevier Science S.A. All rights reserved.