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Chemical Structure| 1079991-69-7 Chemical Structure| 1079991-69-7

Structure of 1079991-69-7

Chemical Structure| 1079991-69-7

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Product Details of [ 1079991-69-7 ]

CAS No. :1079991-69-7
Formula : C9H8FNO4
M.W : 213.16
SMILES Code : O=C(C1C(C)=C([N+](=O)[O-])C(F)=CC=1)OC
MDL No. :MFCD28797654
InChI Key :WWECTNRZJYIRLT-UHFFFAOYSA-N
Pubchem ID :58575232

Safety of [ 1079991-69-7 ]

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

Application In Synthesis of [ 1079991-69-7 ]

* 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 [ 1079991-69-7 ]

[ 1079991-69-7 ] Synthesis Path-Downstream   1~2

  • 1
  • [ 67-56-1 ]
  • [ 1079991-68-6 ]
  • [ 1079991-69-7 ]
YieldReaction ConditionsOperation in experiment
With sulfuric acid; for 12.0h;Reflux; A solution of the obtained crudely purified product (5.70 g, purity 25%) of <strong>[1079991-68-6]4-fluoro-2-methyl-3-nitrobenzoic acid</strong> and sulfuric acid (1.00 mL, 18.8 mmol) in methanol (100 mL) was heated under reflux for 12 hr. The solvent was evaporated under reduced pressure. The residue was diluted with ethyl acetate, washed with aqueous sodium hydroxide solution (10%), water and saturated brine, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure to give methyl 4-fluoro-2-methyl-3-nitrobenzoate (6.01 g, purity 25%) as a crudely purified product. Recrystallization from ether gave methyl 4-fluoro-2-methyl-3-nitrobenzoate (3.01 g, purity 50%) as a crudely purified product. 1H-NMR (CDCl3) delta: 2.57 (3H, s), 3.88 (3H, s) 7.04 (1H, d, J = 8.0 Hz), 8.06 (1H, dd, J = 8.4, 3.2 Hz).
20 g With sulfuric acid; under 760.051 Torr;Reflux; To a solution of 301-A2 (110 g, 502 mmol) in 1.5 L of methanol was added 20 mL of conc. H2SO4. The mixturewas heated to reflux for overnight. The mixture was cooled to room temperature, then concentrated to about 100 mLand then diluted with 500 mL of cold water. The mixture was extracted with EtOAc (500 mL3). The combined organicphase was washed with sat.NaHCO3, water and brine, dried over Na2SO4, filtered and washed with EtOAc, the EtOAcphase was concentrated to dry to give crude product. The crude was recrystallized from PE/EtOAc (10:1, 400 mL) toremoved most major by-products, the residue was purified by column chromatography on slica gel (PE/ EtOAc: 100:1)to give product 301-A (methyl 4-fluoro-2-methyl-3-nitrobenzoate, 20 g, two steps yield: 19%).1H NMR (DMSO-d6, 300 MHz): 8.08 (dd, J = 5.7, 9.0 Hz, 1H), 7.58 (t, J = 9.0 Hz, 1H), , 3.85 (s, 3H), delta 2.45 (s, 3H)
  • 2
  • [ 1079991-69-7 ]
  • [ 1079991-68-6 ]
YieldReaction ConditionsOperation in experiment
100% With water; sodium hydroxide; In methanol; at 25℃; A solution of compound 301-A (methyl 4-fluoro-2-methyl-3-nitrobenzoate, 3.0 g, 14.1 mmol), NaOH (1.6 g, 42.3mmol) in H2O/MeOH (30 mL/30 mL) was stirred at 25 C for overnight. Then the mixture was adjusted pH = 5, extractedby EtOAc (100 mL x 3), washed by brine (100 mL x 2), dried, filtered and concentrated to give compound 301-C (4-fluoro-2-methyl-3-nitrobenzoic acid, 2.8 g, yield: 100%) as a white solid.1H NMR (300 MHz, DMSO-d6) delta 8.06-8.11 (m, 1H), 8.18 (t, J = 9.0 Hz, 1H), 2.47 (s, 3H).
 

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