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Chemical Structure| 405230-80-0 Chemical Structure| 405230-80-0

Structure of 405230-80-0

Chemical Structure| 405230-80-0

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Product Details of [ 405230-80-0 ]

CAS No. :405230-80-0
Formula : C5H2ClFN2O3
M.W : 192.53
SMILES Code : O=[N+](C1=C(F)C=[N+]([O-])C(Cl)=C1)[O-]
MDL No. :MFCD22393660
InChI Key :MEGKAPYCJRCDAE-UHFFFAOYSA-N
Pubchem ID :22284022

Safety of [ 405230-80-0 ]

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

Application In Synthesis of [ 405230-80-0 ]

* 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.

  • Upstream synthesis route of [ 405230-80-0 ]
  • Downstream synthetic route of [ 405230-80-0 ]

[ 405230-80-0 ] Synthesis Path-Upstream   1~2

  • 1
  • [ 405230-80-0 ]
  • [ 89510-90-7 ]
YieldReaction ConditionsOperation in experiment
91% With hydrogen In ethanol for 3 h; 4-Amino-2-chloro-5-fluoropyridine (12). A mixture of 2-chloro-5-fluoro-4-nitropyridine-1-oxide (11, 1.3 g, 6.8 mmol) and 1.6 g of Raney nickel in 80 mL of anhydrous ethyl alcohol was hydrogenated at 40 psi in a Parr hydrogenation apparatus for 3 h when TLC showed that the starting material had disappeared and a new spot was detected (CH2Cl2/EtOAc, 4:1, v/v, Rf 0.78 and 0.71, for the starting material and the product, respectively). The catalyst was removed by filtration and washed carefully with ethyl alcohol. The filtrate and washings were combined and evaporated in vacuo to give 0.9 g (91percent) of product as an off-white solid. A small analytical sample was purified by recrystallization from hot water to afford white crystals: mp 110-111° C.; 1H NMR (CDCl3) δ 4.50 (br s, 2H, NH2, D2O exchangeable), 7.15 (d, 1H, 3-H, J=6 Hz), 7.95 (d, 1H, 6-H, J=2 Hz). Analysis calculated for C5H4ClFN2: C, 40.97; H, 2.75; N, 19.12. Found: C, 41.18; H, 2.39; N, 18.89.
44% With hydrogen In ethanol for 3 h; A mixture of 2-chloro-5-fluoro-4-nitropyridine-l-oxide (0.75 g, 3.9 mmol) and 0.8 g of Raney nickel in 40 niL of anhydrous ethyl alcohol was hydrogenated at 40 psi in a Parr hydrogenation apparatus for 3 hrs when TLC showed that the starting material had disappeared and a new product spot was detected. The catalyst was removed by filtration and washed carefully with ethyl alcohol (2 x 20 niL). Combined filtrate was evaporated in vacuo to give the desired product 4-Amino-2-chloro-5-fluoropyridine (0.25 g, yield: 44percent). 3/4 NMR (CDC13, 400 MHz) δ 7.95 (d, J = 2.0 Hz, 1H), 6.65 (d, J= 6.0 Hz, 1H), 4.52 (br s, 2H). LCMS(ESI) m/z: 1 13.4 [M+H+].
References: [1] Nucleosides, Nucleotides and Nucleic Acids, 2001, vol. 20, # 12, p. 1975 - 2000.
[2] Patent: US2004/116362, 2004, A1, . Location in patent: Page/Page column 12; Figure 1.
[3] Patent: WO2011/113802, 2011, A2, . Location in patent: Page/Page column 107.
  • 2
  • [ 405230-80-0 ]
  • [ 405230-93-5 ]
References: [1] Nucleosides, Nucleotides and Nucleic Acids, 2001, vol. 20, # 12, p. 1975 - 2000.
[2] Patent: WO2011/113802, 2011, A2, .
 

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