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Chemical Structure| 3575-09-5 Chemical Structure| 3575-09-5

Structure of 3575-09-5

Chemical Structure| 3575-09-5

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Product Details of [ 3575-09-5 ]

CAS No. :3575-09-5
Formula : C4H4N2OS
M.W : 128.15
SMILES Code : O=C(C1=CSC=N1)N
MDL No. :MFCD00623590

Safety of [ 3575-09-5 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H319
Precautionary Statements:P264-P270-P280-P301+P312+P330-P305+P351+P338-P337+P313-P501

Application In Synthesis of [ 3575-09-5 ]

* 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 [ 3575-09-5 ]

[ 3575-09-5 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 3973-08-8 ]
  • [ 3575-09-5 ]
YieldReaction ConditionsOperation in experiment
With ammonia; at 230℃; for 0.5h; General procedure: Into a 1L open reactor was added 500g of carboxylic acid raw material (chemically pure) and stirring was turned on (600 r/min) from the reactorThe bottom is continuously fed with ammonia gas (chemical purity, water content of 5.1percent by weight, flow rate of 100 g/min) to the carboxylic acid feed. After the reaction was allowed to proceed for TC hours at the reaction temperature TA, ammonia gas flow was stopped. The contents of the reactor were sampled and subjected to nuclear magnetic proton and elemental analysis to characterize the amide intermediate. Specific reaction conditions and characterization results are shown in Table A-1, Table A-2, Table A-3, Table A-4, Table A-5 and Table A-6. These characterization results show that the amide intermediates obtained have an extremely high purity (above 99percent).In this embodiment, the ammonia gas can be directly replaced with waste ammonia gas (from Yangzi Petrochemical Plant, containing approximately50wtpercent of ammonia gas, the rest were toluene, oxygen, nitrogen, steam, carbon monoxide, and carbon dioxide, and the flow rate of this waste ammonia was 130g/min).
A mixture of thiazole-4-carboxylic acid (10.0 g, 77.4 mmol) and SOCl2 (100 mL) was stirred for 5 hrs at 60 °C. The resulting reaction mixture was then cooled and concentrated in vacuo and the residue was dissolved in THF (100 mL). To the solution was added ammonium hydroxide (18.1 mL, 465 mmol) slowly at 0 °C. The resulting mixture was stirred for one hour at rt, then diluted with water (100 mL) and extracted in DCM (50 mL) for three times. The combined organic layer was dried over anhydrous Na2S04 and concentrated in vacuo to give crude thiazole-4-carboxamide (10.3g) as yellow solid, which was used in the next step.
 

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