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Chemical Structure| 57729-79-0 Chemical Structure| 57729-79-0

Structure of 57729-79-0

Chemical Structure| 57729-79-0

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Product Details of [ 57729-79-0 ]

CAS No. :57729-79-0
Formula : C7H4ClF3N2O2
M.W : 240.57
SMILES Code : NC1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1Cl
MDL No. :MFCD00042153

Safety of [ 57729-79-0 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of [ 57729-79-0 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 57729-79-0 ]

[ 57729-79-0 ] Synthesis Path-Downstream   1~2

  • 1
  • [ 57729-79-0 ]
  • [ 401-93-4 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; sulfuric acid; sodium nitrite; In (2S)-N-methyl-1-phenylpropan-2-amine hydrate; ethanol; Step 1 56.7 ml of 96% sulphuric acid are added dropwise over 30 min to a brown solution of 90 g (374 mmol) of 4-amino-3-chloro-5-nitro-benzotrifluoride (Maybridge; Tintagel/England) in 500 ml of ethanol (exothermic). After heating to 75 C., 64.53 g (935 mmol) of sodium nitrite are added in portions over 1 h (gas evolution). Stirring is effected for 2.5 h at 75 C., followed by cooling to RT. The reaction mixture is poured onto 1.5 l of ice water and extracted 4 times with diethylether. Washing of the organic phase with 0.1 N HCl, sat. NaHCO3 solution and brine, drying (Na2SO4) and concentrating by evaporation yield a brown oil. Column chromatography (SiO2; hexane) yields 5-chloro-3-trifluoromethyl-nitrobenzene as an oil; 1H-NMR (DMSO-d6) delta8.62 (m, 1 H), 8.46 (m, 2H).
With hydrogenchloride; sulfuric acid; sodium nitrite; In ice-water; ethanol; 111a 5-Chloro-3-trifluoromethyl-nitrobenzene (see also: EP 0 516 297 A1) 56.7 ml of 96% sulfuric acid are added dropwise over a period of 30 minutes to a brown solution of 90 g (374 mmol) of 4-amino-3-chloro-5-nitro-benzotrifluoride (Maybridge; Tintagel/England) in 500 ml of ethanol (exothermic). After heating to 75 C., 64.53 g (935 mmol) of sodium nitrite are added in portions over a period of one hour (evolution of gas). The mixture is stirred for 2.5 hours at 75 C. and then cooled to room temperature. The reaction mixture is poured onto 1.5 liters of ice-water and extracted four times with ether. Washing the organic phases with 0.1 N HCl, saturated NaHCO3solution and brine, drying (Na2SO4) and concentration by evaporation yield a brown oil. Column chromatography (SiO2; hexane) yields the title compound in the form of an oil: 1H-NMR (DMSO-d6) 8.62 (m, 1H), 8.46 (m, 2H), MS 225 (M)+, 179 (M-NO2)+.
  • 2
  • [ 657-02-3 ]
  • [ 57729-79-0 ]
YieldReaction ConditionsOperation in experiment
98.1% With ammonia; at 200.0℃;Large scale; To the reactor was added <strong>[657-02-3]3,4-dichloro-5-nitrobenzotrifluoride</strong> 600Kg, airtight reactor, nitrogen substitution, open stirring, gradually warmed to 200 C, gradually through the ammonia gas,To pass into the amount of 125Kg, the sampling tube sampling and detection of <strong>[657-02-3]3,4-dichloro-5-nitrobenzotrifluoride</strong> 0.3%, cooled to below 80 C, venting ammonia gas to the tail gas recovery unit, the kettle 200Kg * 2 washing,The organic layer was washed with saturated brine and dehydrated under reduced pressure to obtain 544 kg of the obtained product (yield: 99.1%, water: 0.5%, yield: 98.1%).
 

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