Elemental fluorine. Part 19: Electrophilic fluorination of hexyl derivatives bearing electron withdrawing groups
作者:Richard D. Chambers、Mandy Parsons、Graham Sandford、Emmanuelle Thomas、Jelena Trmcic、John S. Moilliet
DOI:10.1016/j.tet.2006.03.113
日期:2006.7
Reaction of a series of model hexyl derivatives of the form C6H13–X (X=Cl, Br, I, CO2Me, COMe, CHO) with both elemental fluorine and Selectfluor™ was studied in order to assess the impact of electron withdrawing functional groups upon fluorination of an alkyl chain. Fluorination generally occurs at secondary sites, with a slight preference for those that are furthest removed from the electron withdrawing
研究了一系列形式为C 6 H 13 –X(X = Cl,Br,I,CO 2 Me,COMe,CHO)的模型己基衍生物与元素氟和Selectfluor™的反应,以评估氟的影响。烷基链氟化时的吸电子官能团。氟化通常发生在次要位置,与亲电子取代过程一致,略微偏爱从吸电子基团离得最远的位置,尽管在大多数情况下会获得氟化产物的混合物。
Boron trifluoride promoted reactions of n-haloelectrophiles with alkenes
作者:Gene E. Heasley、J. Mark Janes、Stephen R. Stark、Brian L. Robinson、Victor L. Heasley、Dale F. Shellhamer
DOI:10.1016/s0040-4039(00)94744-0
日期:1985.1
N-Haloelectrophiles react with alkenes in the presence of boron rifluoride etherate to give halofluorides and N-halo adducts.
Synthetic methods and reactions. 63. Pyridinium poly(hydrogen fluoride) (30% pyridine-70% hydrogen fluoride): a convenient reagent for organic fluorination reactions
作者:George A. Olah、John T. Welch、Yashwant D. Vankar、Mosatomo Nojima、Istvan Kerekes、Judith A. Olah
DOI:10.1021/jo01336a027
日期:1979.10
Generation of Interhalogen Fluorides under Mild Conditions: A Comparison of Sluggish and Reactive Interhalogen Fluorides
作者:Dale F. Shellhamer、Mark J. Horney、Benjamin J. Pettus、Tobiah L. Pettus、Joy Merry Stringer、Victor L. Heasley、Robert G. Syvret、John M. Dobrolsky
DOI:10.1021/jo972319g
日期:1999.2.1
Interhalogen fluorides (XF; X = I, Br, or Cl) generated from xenon difluoride (XeF2) or triethylamine trihydrofluoride (TREAT HF) with iodine (I-2), N-halosuccinimides (NXS; X = I, Br, or CI), or alkylhypohalites (ROX; R = CH3 or t-Bu, X = Br or Cl) with alkenes and aromatics are reported. A comparison of the above reactions with other methods reported in the literature to generate interhalogen fluorides is made. Interhalogens generated from direct action of elemental fluorine (F-2) or XF3 (X = I, Br, or Cl) with chlorine (Cl-2), bromine (Br-2), or iodine (I-2) give a species that can react with electron-deficient alkenes or aromatics. These reagents are too reactive for electron-rich substrates. Interhalogen fluorides from reagents like NXS or ROX with XeF2 or amine HF are much less reactive and give good yields with electron-rich akenes or aromatics.
PREPARATION OF SELECTIVELY FLUORINATED ORGANIC COMPOUNDS