作者:A. V. Fokin、V. A. Komarov、A. F. Kolomiets、A. I. Rapkin、T. M. Potarina
DOI:10.1007/bf00923957
日期:1978.3
Fluorination and chlorination of nitroalkyl groups
作者:Philip Butler、Bernard T. Golding、Gilles Laval、Hossein Loghmani-Khouzani、Reza Ranjbar-Karimi、Majid M. Sadeghi
DOI:10.1016/j.tet.2007.08.020
日期:2007.11
Heterocycles substituted with a nitromethyl (CH2NO2) or phenyl-nitromethyl (CHPhNO2) group were prepared by reaction of a methyl- or phenylmethyl-substituted heterocycle, respectively, with lithium di-isopropylamide followed by quenching the intermediate carbanion with methyl nitrate. Conversion of CH2NO2 attached to an alkyl or aryl moiety into a dichloronitromethyl (CCl2NO2) group was achieved using N-chlorosuccinimide and 1,8-diazabicyclo[5.4.0] undec-7-ene (DBU) in dichloromethane. Similarly, CH2NO2 attached to an alkyl or aryl group was converted into difluoronitromethyl (CF2NO2) using either 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis( tetrafluoroborate) (Selectfluor (TM)) or N-fluorobenzenesulfonimide with DBU as base and dichloromethane as solvent. Reaction of omega-nitroacetophenone with Selectfluor/DBU in dimethylformamide followed by acidification and distillation gave the parent difluoronitromethane in a useful 'one-pot' procedure. (c) 2007 Elsevier Ltd. All rights reserved.
Fokin, A. V.; Uzun, A. T.; Kosyrev, Yu. M., Zhurnal Obshchei Khimii, 1966, vol. 36, p. 559 - 561
作者:Fokin, A. V.、Uzun, A. T.、Kosyrev, Yu. M.
DOI:——
日期:——
Fluorine-Containing Nitrogen Compounds. V. Difluoronitroacetamidines and Difluoronitromethyl-1,2,4-triazoles<sup>1,2</sup>