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Nitryl tetrafluoroborate

Nitrosyl hydrogen sulfate adds to aikenes at -40 C in liquid SO , in Markovnikov fashion giving 2-sulfato-oximes (37-84%).Reactions of nitrogen oxides with aikenes are usually complex, yet some have limited industrial, rather than laboratory, importance. Nitryl tetrafluoroborate in acetic anhydride at -65 to -45 C adds Markovnikov fashion to aikenes, with only fair stereoselectivity, giving 3-ni-troacetates in 36-40% yields. Nitryl fluorosulfonate adds to perfluoroalkenes in fluorosulfonic acid/ffeon-113 giving 63-92% 0-nitroperfluoroalkyl fluorosulfonates. [Pg.493]

Fluorine and nitrogen may be added to olefins with the nitrogen in different oxidation states Fluorine and a nilro group are added by reaction of an olefin with nitryl fluoride [131], nitronium tetrafluoroborate [195] (equation 32), or a combination of nitric acid and hydrogen fluoride [131, 196] (equation 33)... [Pg.76]

Nitronium tetrafluoroborate is thermally stable up to 170°. Above this temperature it starts to dissociate into nitryl fluoride and boron trifluoride. [Pg.59]

Nitryl chloride (NO2CI) also adds to alkenes, to give p-halo nitro compounds, but this is a free-radical process. The NO2 goes to the less-substituted carbon. Nitryl chloride also adds to triple bonds to give the expected l-nitro-2-chloro alkenes. The compound FNO2 can be added to alkenes by treatment with HF in HNOa or by addition of the alkene to a solution of nitronium tetrafluoroborate (NOJBF4, see 11-2) in 70% polyhydrogen fluoride-pyridine solution (see also 15-37). [Pg.1046]

Nitration of acetylenes with nitryl iodide followed by elimination of HI gives nitroacetylenes, but nitroacetylenes are too thermally unstable to be useful for organic synthesis.77 Recently, nitro-trimethylsilyl-acetylenes are prepared as stable nitroacetylenes by the reaction of bis(trimethylsily)acetylene with nitronium tetrafluoroborate (Eq. 2.39).78... [Pg.15]

Alkyl lV,lV-dinitramines (154) have been prepared from the reaction of the tetraalkylam-monium salts (155) of primary nitramines with nitryl fluoride in acetonitrile at subambient temperature. The same reaction with the primary nitramine or its alkali metal salts yields the corresponding nitrate ester. Treatment of the ammonium, potassium, or lithium salts of primary nitramines (156) with a solution of nitronium tetrafluoroborate in acetonitrile at subambient temperature yield alkyl iV,iV-dinitramines. ° The same reactions in ether or ester solvents enables the free nitramine to be used. The nitrolysis of A-alkylnitramides (157) and N,N-diacylamines with nitronium tetrafluoroborate in acetonitrile, and the nitration of aliphatic isocyanates with nitronium tetrafluoroborate and nitric acid in acetonitrile, also yield alkyl A,A-dinitramines (154). [Pg.287]

Dioxygenyl tetrafluoroborate Organic materials Nitric acid Hydrocarbons Nitryl perchlorate Organic solvents Oxygen (Liquid) Hydrocarbons Ozone Aromatic compounds, or Benzene, etc. Ozone Aromatic compounds, or Benzene, etc. Permanganic acid Organic materials Peroxodisulfuric acid Organic liquids Peroxomonosulfuric acid Aromatic compounds Silver perchlorate... [Pg.828]

Reaction with Nitryl Iodide and Nitronium Tetrafluoroborate... [Pg.682]

Nitration Acetone cyanohydrin nitrate. Acetyl nitrate. /-Amyl nitrate. Cupric nitrate-Acetic anhydride. Dinitrogen pentoxide. Dinitrogen tetroxide. Dinitrogen tetroxide-Boron trifluoride. Nitronium tetrafluoroborate. Nitryl chloride. Polyphosphoric acid-Nitric acid. Potassium f-butoxide-Amyl nitrate. Tetranitromethane. [Pg.659]


See other pages where Nitryl tetrafluoroborate is mentioned: [Pg.417]    [Pg.417]    [Pg.561]    [Pg.818]    [Pg.134]    [Pg.108]    [Pg.109]    [Pg.63]    [Pg.108]    [Pg.109]   


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