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[ CAS No. 34461-00-2 ] {[proInfo.proName]}

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Chemical Structure| 34461-00-2
Chemical Structure| 34461-00-2
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Product Details of [ 34461-00-2 ]

CAS No. :34461-00-2 MDL No. :MFCD05665630
Formula : C3H2NNaO4 Boiling Point : -
Linear Structure Formula :- InChI Key :-
M.W : 139.04 Pubchem ID :-
Synonyms :

Safety of [ 34461-00-2 ]

Signal Word:Danger Class:8
Precautionary Statements:P260-P264-P270-P271-P280-P301+P312+P330-P301+P330+P331-P303+P361+P353-P304+P340+P310-P305+P351+P338-P337+P313-P362+P364-P405-P501 UN#:1759
Hazard Statements:H302+H312+H332-H314-H319 Packing Group:
GHS Pictogram:

Application In Synthesis of [ 34461-00-2 ]

* 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 [ 34461-00-2 ]

[ 34461-00-2 ] Synthesis Path-Downstream   1~12

  • 1
  • [ 456-14-4 ]
  • [ 34461-00-2 ]
  • [ 324-98-1 ]
  • 5
  • [ 34461-00-2 ]
  • [ 1225387-53-0 ]
  • [ 63572-73-6 ]
YieldReaction ConditionsOperation in experiment
84% In acetic acid; at 90℃; A suspension of lH-pyrazol-5-amine (0.804 g, 9.48 mmol) and sodium nitromalonaldehyde monohydrate (1.56 g, 9.96 mmol) in acetic acid (12 mL) was heated to 9O0C overnight. The reaction mixture was cooled to room temperature and poured into water (50 mL). The resulting solids were collected by filtration. The solids were washed with water (3 X 20 mL) and dried in vacuo to give 5-nitro-l H-pyrazolo [3 ,4-b]pyridine (1.40 g, 84%) as a solid.
84% In acetic acid; at 90℃; A suspension of lH-pyrazol-5 -amine (0.804 g, 9.48 mmol) and sodium nitromalonaldehyde monohydrate (1.56 g, 9.96 mmol) in acetic acid (12 mL) was heated to 90C overnight. The reaction mixture was cooled to room temperature and poured into water (50 mL). The resulting solids were collected by filtration. The solids were washed with water (3 X 20 mL) and dried in vacuo to give 5-nitro-lH-pyrazolo[3,4-b]pyridine (1.40 g, 84%) as a solid.
  • 6
  • [ 34461-00-2 ]
  • [ 1225387-53-0 ]
  • [ 63572-73-6 ]
  • [ 116835-08-6 ]
  • 7
  • [ 21906-39-8 ]
  • [ 34461-00-2 ]
  • [ 79287-44-8 ]
  • 8
  • [ 1004-38-2 ]
  • [ 34461-00-2 ]
  • [ 38944-17-1 ]
  • 9
  • [ 1128-56-9 ]
  • [ 34461-00-2 ]
  • [ 898567-89-0 ]
YieldReaction ConditionsOperation in experiment
With acetic acid; for 24h;Heating / reflux; Compound 3A (3.0 g, 18.868 mmol) and sodium nitromalonaldehyde monohydrate (2.623 g, 18.868 mmol, prepared according to the procedures reported in Org. Synth. IV. 844, (1963)) in acetic acid (100 mL) was refluxed for 24 hours. After cooling to RT, the reaction was concentrated under reduced pressure to remove most of the acetic acid. The resulting residue was dissolved in CH2Cl2 (200 mL), then washed with IN aqueous NaOH (2×200 mL), water (100 mL), saturated NaCl (100 mL). The organic layer was dried (MgSO4), and concentrated to give a dark brown residue. The residue was purified by silica gel column chromatography eluting with 2 M NH3 in MeOH/CH2Cl2 (1:99 ratio) to give the title compound, 5-nitro-2-phenyl-2H-pyrazole[3,4-b]pyridine as a beige colored solid (300 mg). LC/MS (method A): retention time=2.62 min; (M+H)+=241.
  • 10
  • [ 28710-97-6 ]
  • [ 34461-00-2 ]
  • [ 1418299-20-3 ]
YieldReaction ConditionsOperation in experiment
81% With chloro-trimethyl-silane; In N,N-dimethyl-formamide; at 100℃;Inert atmosphere; General procedure: 7 (2.0 mmol, 0.38 g) and the corresponding amine (2.0 mmol) were placed in pressure tube under the flow of dry argon and dissolved in dry DMF (10 mL) containing 1 mL of TMSCl. The mixture was heated at 100 C during 2-12 h (controlled by TLC). Then this solution was evaporated under reduced pressure, treated with water, filtrated and dried on the air and recrystallized from an appropriate solvent, or was subjected to a column chromatography over silica gel.
  • 11
  • [ 1820-80-0 ]
  • [ 34461-00-2 ]
  • [ 63572-73-6 ]
YieldReaction ConditionsOperation in experiment
33% With hydrogenchloride; zinc(II) chloride; In ethanol; for 1h;Reflux; 1H-pyrazol-3-amine (427 mg, 5.139 mmol) was dissolved in ethanol (10 mL) and 12M HCl (0.5 mL) was added to the stirred solution, followed by granulated zinc chloride (300 mg). The mixture was heated to reflux, and to the mixture was added a solution of 5.139 mmol of the source of the appropriate 1,3-dicarbonyl compound (sodium 2-nitro-1,3-dioxopropan-2-ide) in ethanol (5 mL). After 1 h the reaction mixture was poured into ice-cold water (15 mL), the resultant solution was made alkaline with concentrated aqueous ammonia, and the product was isolated by trichloromethane extraction. The product 5-nitro-1H-pyrazolo[3,4-b]pyridine (279 mg, 33 %) (A) was isolated and purified by column chromatography.
  • 12
  • [ 1820-80-0 ]
  • [ 34461-00-2 ]
  • [ 63572-73-6 ]
YieldReaction ConditionsOperation in experiment
33% 1H-pyrazol-3-amine (427 mg, 5.139 mmol) was dissolved in ethanol (10 mL) and 12M HCl (0.5 mL) was added to the stirred solution, followed by granulated zinc chloride (300 mg). The mixture was heated to reflux, and to the mixture was added a solution of 5.139 mmol of the source of the appropriate 1,3-dicarbonyl compound (sodium 2-nitro-1,3-dioxopropan-2-ide) in ethanol (5 mL). After 1 h the reaction mixture was poured into ice-cold water (15 mL), the resultant solution was made alkaline with concentrated aqueous ammonia, and the product was isolated by trichloromethane extraction. The product 5-nitro-1H-pyrazolo[3,4-b]pyridine (279 mg, 33%) ( A) was isolated and purified by column chromatography.
27% In water; at 90℃; for 16h; To a solution of sodium nitromalonaldehyde monohydrate(1.23 g, 7.81 mmol) in water was added 1H-pyrazol-3-amine(0.84 g, 7.43 mmol). The mixture was stirred at 90 C for 16 h andthen cooled to room temperature. The reaction solution wasadjusted to pH 5 and extracted by ethyl acetate (200 mL). Theorganic layer was dried over Na2SO4 and evaporated. The residuewas purified by silica gel chromatography (1% MeOH in dichloromethane)to give 5-nitro-1H-pyrazolo [4,3-b]pyridine as a whitesolid (118 mg, 27%). Rf: 0.23 (DCM/MeOH, 100/1, v/v). Mp:206-208 C. 1H NMR (DMSO-d6, 400 MHz) d 14.40 (s, 1H), 9.35 (d,J 2.5 Hz, 1H), 9.21 (d, J 2.5 Hz, 1H), 8.46 (s, 1H). MS (ESI) m/z:162.8 [MH]-.
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[ 34461-00-2 ]

Chemical Structure| 609-32-5

A504165[ 609-32-5 ]

2-Nitromalonaldehyde

Reason: Free-salt

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