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Chemical Structure| 258261-48-2 Chemical Structure| 258261-48-2

Structure of 258261-48-2

Chemical Structure| 258261-48-2

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Product Details of [ 258261-48-2 ]

CAS No. :258261-48-2
Formula : C8H12N2O2S
M.W : 200.26
SMILES Code : O=C(C1=C(C)N=C(C)S1)N(OC)C

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Application In Synthesis of [ 258261-48-2 ]

* 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 [ 258261-48-2 ]

[ 258261-48-2 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 53137-27-2 ]
  • [ 6638-79-5 ]
  • [ 258261-48-2 ]
YieldReaction ConditionsOperation in experiment
To a flask containing <strong>[53137-27-2]2,4-dimethylthiazole-5-carboxylic acid</strong> (2.50 g, 15.9 mmol) was added DCM (75 mL) and DMF (3 mL) to afford a homogeneous solution. Then, carbonyldiimidazole (2.84 g, 17.5 mmol) was added and the mixture was stirred at room temperature for 2 hours. N,O-dimethylhydroxylamine hydrochloride (1.90 g, 19.9 mmol) was then added and the reaction mixture was stirred at room temperature for 18 hours, then diluted with water and 1 N NaOH and extracted with DCM (4×50 mL). The combined organics were washed with brine, dried over Na2SO4, filtered and concentrated. Flash chromatography on silica gel (10-40% EtOAc-DCM) provided the title compound as a colorless oil.
To a flask containing <strong>[53137-27-2]2,4-dimethylthiazole-5-carboxylic acid</strong> (2.5 g, 15.9 mmol) was added DCM (75 mL) to give a suspension. DMF (3 mL) was added which resulted in a homogeneous solution. Then, carbonyldiimidazole (2.84 g, 17.5 mmol) was introduced and the mixture was stirred at room temperature for 2 hours. N,O-dimethylhydroxylamine HCl (1.9 g, 19.9 mmol) was then added and the mixture was stirred at room temperature for 18 hours, at which time the reaction mixture was diluted with water and 1 N aqueous NaOH and the aqueous portion was extracted with DCM (4*50 mL). The combined organics were washed with brine, dried over Na2SO4, filtered and concentrated. Chromatography on silica gel (10% EtOAc-DCM increasing to 40% EtOAc) provided the title compound as a colorless oil.
intermediate 17: step aN-methoxy-N,2,4-trimethylthiazole-5-carboxamideTo a flask containing 2,4-dimethylthiazole~5~carboxylic acid (2.5 g, 15.9 mmol) was added DCM (75 mL) to give a suspension . DMF (3 mL) was added which resulted in a homogeneous solution. Then, carbonyldiimidazole (2.84 g, 17.5 mmol) was introduced and the mixture was stirred at, room temperature for 2 hours. N,0-dim.ethymydroxylamine HQ (1 .9 g, 19.9 mmol) was then added and the mixture was stirred at room temperature for 18 hours, at which time the reaction mixture was diluted with water and 5 N aqueous NaOH and the aqueous portion was extracted with DCM (4 x 50 mL). The combined organics were washed with brine, dried over a2S04, filtered and concentrated. Chromatography on silica gel (1 0% EtOAc-DCM increasing to 40% EtOAc) provided the title compound as a colorless oil.
 

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