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Chemical Structure| 1154881-82-9 Chemical Structure| 1154881-82-9

Structure of 1154881-82-9

Chemical Structure| 1154881-82-9

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Product Details of [ 1154881-82-9 ]

CAS No. :1154881-82-9
Formula : C9H7ClN2O2S
M.W : 242.68
SMILES Code : O=C(C1=CN(CC2=CC=C(Cl)S2)N=C1)O

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Application In Synthesis of [ 1154881-82-9 ]

* 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 [ 1154881-82-9 ]

[ 1154881-82-9 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 23784-96-5 ]
  • [ 37622-90-5 ]
  • [ 1154881-82-9 ]
YieldReaction ConditionsOperation in experiment
91% 1 H-Pyrazole-4-carboxylic acid ethyl ester (0.763g, 5.45mmol) was stirred in acetone (15mL) with potassium carbonate (2.64g, 19mmol) and 2-chloro-5-chloromethyl- thiophene (1.Og, 5.99mmol) was added. The reaction was heated at 5O0C for 4 hours. The reaction was cooled and the inorganics were separated via filtration. The filter cake was washed through with ethyl acetate (2x1 OmL) and the combined washings and filtrate were concentrated in vacuo.The residue was refluxed in a mixture of methanol (15mL) and H2O (3ml) containing potassium hydroxide (0.83g, 12.5mmol), for 5 hours. The reaction was cooled and concentrated in vacuo. The residue was dissolved in H2O and washed with ethyl acetate. The aqueous layer was separated and carefully acidified using an aqueous 6N hydrochloric acid solution. The resulting precipitate was filtered, washed with copious amounts of water and dried in vacuo to afford (1e), 1-(5-chtoro-thiophen-2- ylmethyl)-1H-pyrazole-4-carboxylic acid, 1.21g, 91%.
 

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