Regiospecific preparation of α,α-dihalofluoromethyl perfluoroalkyl ketones
作者:In Howa Jeong、Donald J. Burton、Daryl G. Cox
DOI:10.1016/s0040-4039(00)83859-9
日期:1986.1
Acylation of -phosphoranium salts with -acyl chlorides gives the corresponding -perfluoro betaine in high yield. Subsequent chlorination or bromination regiospecifically yields the α,α-dihalofluoromethyl perfluoroalkyl ketones.
Reductive alkylation of perfluorocarboxylic acid esters with CCl3F or CCl4 and synthesis of higher linear perfluoroketones
作者:Yu.V. Zeifman、S.A. Postovoi
DOI:10.1016/j.jfluchem.2003.11.008
日期:2004.12
Barbier-type reductive alkylation of perfluorocarboxylicacidesters (I) with CFCl3 and activated Al was successfully performed to give α,α-dichloroperfluoroketones (II). A similar reaction of CF3COOEt with CCl4 and Al provided a convenient synthesis of CF3COCCl3. Ketones (II) were fluorinated further with SbF5 to form higher linear perfluoroketones (IX). An alternative approach to the synthesis of
Regiospecific preparation of α,α-dihalofluoromethyl perfluoroalkyl ketones via halogenation of perfluoro betaines
作者:Donald J. Burton、In Howa Jeong
DOI:10.1016/s0022-1139(00)80099-8
日期:1993.6
Acylation of fluorinated phosphoranium salts with perfluorinated acyl chlorides provided the corresponding (Z)-perfluoro betaines in high yield. Subsequent chlorination or bromination of the betaines regiospecifically yields the alpha,alpha-dihalofluoromethyl perfluoroalkyl ketones. Halogen specificity is best controlled via use of CFCl3/Cl2 for the preparation of dichloroketones and CFBr3/Br2 for the corresponding dibromoketones. The dihalophosphorane by-product can promote a halogen-exchange reaction with ketones.
Manufacture of fluorinated salts and acids
申请人:ALLIED CHEM &
公开号:US02827486A1
公开(公告)日:1958-03-18
ZEJFMAN, YU. V.;POSTOVOJ, S. A.;VOLPIN, I. M.;GERMAN, L. S., DOKL. AN CCCP, 307,(1989) N, S. 1385-1390
作者:ZEJFMAN, YU. V.、POSTOVOJ, S. A.、VOLPIN, I. M.、GERMAN, L. S.