Preparation and synthetic utility of fluorinated phosphonium salts, -phosphonium salts and phosphoranium salts [1]
作者:Donald J. Burton
DOI:10.1016/s0022-1139(00)81218-x
日期:1983.10
fluorohalomethanes provides a rapid and high yield synthesis of various types of fluorinated phosphonium salts, bis-phosphonium salts and phosphoranium salts. These salts are useful precursors to fluorine-containing ylides, carbenes and methide ions. Examples of the preparation, mechanism of formation, and syntheticutility of these novel reagents is described.
Reactions of fluoroalk-1-en-1-yltrifluoroborate and perfluoroalk-1-yn-1-yltrifluoroborate salts and selected hydrocarbon analogues with hydrogen fluoride and with halogenating agents in aHF and in basic solvents
作者:Vadim V. Bardin、Nicolay Yu. Adonin、Hermann-Josef Frohn
DOI:10.1016/j.jfluchem.2011.09.011
日期:2012.3
products. In contrast, the salts K[RCFCFBF3] (R = CnF2n+1, trans-C4H9) and K[CF3CCBF3] underwent bromodeboration to RCFCFBr and CF3CCBr, respectively, when they were reacted with bromine in the polar solvents MeOH, MeCN, or sulfolane.
K的电hydrodeboration [R'BF的相对速率3 ]与HF(27-100%)系列中的R'=减少Ç 4 ħ 9 Ç C> c ^ 4 ˚F 9 CF CFC C> CF 2 C(CF 3)> C 3 F 7 C C〜(CF 3)2 CFC C> CF 3 CC 。当R'= CF 3 C C时,通过添加获得新盐K [CF 3 CH 2 –CF 2 BF 3 ] CF 3 C以外的HF含量CH和K [BF 4 ]。少量水引起副产物K [CF 3 CH 2 –C(O)BF 3 ]的形成。全氟链烯基三氟硼酸盐与NCS或NBS在aHF(无水HF)中的亲电子卤代氟化作用导致K [R F CFHal–CF 2 BF 3 ](来自K [R F CF CFBF 3 ])和K [R F CFal 2 –CF 2 BF 3 ](来自K [R F CHal CFBF 3 ]和K [R F C CBF 3
Isomerization of monohydroperfluoroalkenes
作者:T. I. Filyakova、A. Ya. Zapevalov、M. I. Kodess、M. A. Kurykin、L. S. German
DOI:10.1007/bf00697141
日期:1994.9
Isomerization of monohydroperfluoro-1-alkenes HC(CF2)nCF=CF2 (n = 2 to 8) catalyzed by Lewis bases or acids (CsF, KHF2, and SbF5) under conditions of thermodynamiccontrol affords equilibrium mixtures of all of the possible isomers resulting from migration of the double bond along the carbon chain. Under conditions of kineticcontrol, isomerization through the action of SbF5 gives ω-H-perfluoro-2-alkenes. The