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Chemical Structure| 700844-19-5 Chemical Structure| 700844-19-5

Structure of 700844-19-5

Chemical Structure| 700844-19-5

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Product Details of [ 700844-19-5 ]

CAS No. :700844-19-5
Formula : C8H4ClNO2S
M.W : 213.64
SMILES Code : O=C(C1=CN=C2C(C=CS2)=C1Cl)O

Safety of [ 700844-19-5 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of [ 700844-19-5 ]

* 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 [ 700844-19-5 ]

[ 700844-19-5 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 59713-58-5 ]
  • [ 700844-19-5 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; sodium hydroxide; In ethanol; REFERENCE EXAMPLE 11 4-Chlorothieno[2,3-b]pyridine-5-carboxylic acid A mixture of <strong>[59713-58-5]ethyl 4-chlorothieno[2,3-b]pyridine-5-carboxylate</strong> (800 mg, 3.31 mmol) [Khan, M. A.; Guarconi, A. E., J. Heterocyclic Chem., 14, 807 (1977)] in 15 mL of ethanol and 5 mL of 2.5 N sodium hydroxide is heated at reflux for 90 minutes. The mixture is cooled to 0C and the pH is adjusted to 4 by the addition of 2 N hydrochloric acid. The mixture is stirred at room temperature and the resulting precipitate is collected by filtration and washed with water to provide 250 mg of 4-chlorothieno[2,3-b]pyridine-5-carboxylic acid as a white solid, mp 172-174 C.; 1H NMR (DMSO-d6) delta7.62 (d, J=6 Hz, 1H), 8.14 (d, J=6 Hz, 1H), 8.94 (s, 1H); MS 212.0 (M-H)-. Analysis for C8H4ClNO2S: Calcd: C, 44.98; H, 1.89; N, 6.56 Found: C, 44.99; H, 2.14; N, 6.43.
Reference Example 11 4-CHLOROTHIENO [2,3-b] pyridine-5-carboxylic acid A mixture of ethyl 4-CHLOROTHIENO [2,3-b] pyridine-5-carboxylate (800 mg, 3.31 MMOL) [Khan, M. A.; Guarconi, A. E. , J. Heterocyclic CHEM., 14, 807 (1977) ] in 15 mL of ethanol and 5 mL of 2.5 N sodium hydroxide is heated at reflux for 90 minutes. The mixture is cooled to 0C and the pH is adjusted to 4 by the addition of 2 N hydrochloric acid. The mixture is stirred at room temperature and the resulting precipitate is collected by filtration and washed with water to provide 250 mg of 4- chlorothieno [2,3-b] pyridine-5-carboxylic acid as a white solid, mp 172-174C ; 1 H NMR (DMSO-d6) 87. 62 (d, J = 6 Hz, 1H), 8.14 (d, J = 6 Hz, 1H), 8.94 (s, 1H) ; MS 212.0 (M-H) -. Analysis for C8H4CIN02S : CALCD : C, 44.98 ; H, 1.89 ; N, 6.56 Found: C, 44.99 ; H, 2.14 ; N, 6.43. An additional 230 mg of 4-chlorothieno [2,3-b] pyridine-5-carboxylic acid is obtained from the filtrate.
 

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