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Product Details of [ 98434-06-1 ]

CAS No. :98434-06-1 MDL No. :MFCD04113954
Formula : C8H5NO4 Boiling Point : -
Linear Structure Formula :- InChI Key :MLWFYCMVBAIITM-UHFFFAOYSA-N
M.W : 179.13 Pubchem ID :1090982
Synonyms :

Safety of [ 98434-06-1 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P261-P305+P351+P338 UN#:N/A
Hazard Statements:H315-H319-H335 Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 98434-06-1 ]

* 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 [ 98434-06-1 ]
  • Downstream synthetic route of [ 98434-06-1 ]

[ 98434-06-1 ] Synthesis Path-Upstream   1~3

  • 1
  • [ 33545-40-3 ]
  • [ 98434-06-1 ]
YieldReaction ConditionsOperation in experiment
90%
Stage #1: With lithium hydroxide; water In tetrahydrofuran; methanol for 15 h;
Stage #2: With hydrogenchloride In water
To a solution of 5-furan-2-yl-isoxazole-3-carboxylic acid ethyl ester (4.14 g) inTHF(130 mL) and methanol (25 mL) was slowly added IN lithiun hydroxide aqueous solution (80 mL). The resulting mixture was stirred for 15 hours, and then concentrated under reduced pressure. The remaining solution was acidified with IN hydrochloric acid to form a solid, and the solid was filtered, washed with distilled water, dried to give 3.22 g of 5-furan-2-yl-isoxazole-3-carboxylic acid (yield: 90 percent) as a white solid.[178] .H-NMR(acetone-d , 200MHz), ppm(δ): 7.90~7.86(m, IH), 7.19(d, IH), 7.00(s, IH), 6.77-6.73(1H IH)
90%
Stage #1: With lithium hydroxide; water In tetrahydrofuran; methanol for 15 h;
Stage #2: With hydrogenchloride In water
4.14 g of 5-furan-2-yl-isoxazole-3-carboxylic acid ethyl ester was dissolved in 130 mL of THF 130 mL and 25 mL of methanol before the slow addition of 80 mL of aqueous 1N lithium hydroxide.
Stirring for 15 hrs was followed by the removal of THF and methanol under reduced pressure.
The residue was acidified with 1N HCl to produce a precipitate which was then filtered, washed with distilled water and dried to produce 3.22 g of 5-furan-2-yl-isoxazole-3-carboxylic acid as a white solid (Yield: 90percent).
1H-NMR (acetone-d6, 200 MHz), ppm(δ): 7.90~7.86 (m, 1H), 7.19 (d, 1H), 7.00 (s, 1H), 6.77~6.73 (m, 1H)
90%
Stage #1: With lithium hydroxide; water In tetrahydrofuran; methanol for 15 h;
Stage #2: With hydrogenchloride In water
3) Step 3 : Preparation of 5-furan-2-yl-isoxazole-3-carboxylic acid4.14 g of 5-furan-2-yl-isoxazole-3-carboxylic acid ethyl ester was dissolved in 130 mL of THF 130 mL and 25 mL of methanol before the slow addition of 80 mL of aqueous IN lithium hydroxide. Stirring for 15 hrs was followed by the removal of THF and methanol under reduced pressure. The residue was acidified with IN HCl to produce a precipitate which was then filtered, washed with distilled water and dried to produce 3.22 g of 5-furan-2-yl-isoxazole-3- carboxylic acid as a white solid (Yield: 90 percent).IH-NMR (acetone-ds, 200MHz), ppm(δ): 7.90~7.86(m, IH), 7.19(d, IH), 7.00(s, IH), 6.77~6.73(m, IH)
Reference: [1] Patent: WO2009/5269, 2009, A2, . Location in patent: Page/Page column 18
[2] Patent: US2009/131336, 2009, A1, . Location in patent: Page/Page column 12
[3] Patent: WO2007/78113, 2007, A1, . Location in patent: Page/Page column 36
[4] Gazzetta Chimica Italiana, 1958, vol. 88, p. 879,896
  • 2
  • [ 1192-62-7 ]
  • [ 98434-06-1 ]
Reference: [1] Gazzetta Chimica Italiana, 1958, vol. 88, p. 879,896
  • 3
  • [ 36983-35-4 ]
  • [ 98434-06-1 ]
Reference: [1] Gazzetta Chimica Italiana, 1958, vol. 88, p. 879,896
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