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CAS No. : | 73458-39-6 | MDL No. : | MFCD00160073 |
Formula : | C7H5N3O2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FISVWAMPAATJLP-UHFFFAOYSA-N |
M.W : | 195.20 | Pubchem ID : | 2754759 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* 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.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thiourea; In N-methyl-acetamide; water; | EXAMPLE 4 Preparation of 2-amino-5-nitrobenzothiazole 11.71 g of 2,4-dinitrophenyl thiocyanate are added, over the course of 15 minutes, to a solution of 7.6 g of thiourea in 50 ml of dimethylformamide at 150 C. The mixture is stirred at 150 C. for a further 2 hours, and the product is discharged into 500 ml of water, and the solid is filtered off with suction and washed with water. 11 g of crude 2-amino-5-nitrobenzothiazole are obtained, its identity being confirmed by TLC comparison with authentic material. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With bromine; In dichloromethane; at 5℃; | General procedure: Substituted phenylthiourea (0.1 mol) was taken in CHCl3 and stirred with a mechanical stirrer and bromine (0.1 mol) was added drop by drop for a period of an hour with continuous stirring. The temperature was maintained <5C. After bromine addition, the stirring was maintained for 4-5 hours. The product obtained was dried, followed by SO2 water treatment and filtered. The filtrate obtained was treated with aq. NH3 in neutral conditions. The obtained precipitate was filtered, dried, and recrystallized from absolute alcohol. |
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