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CAS No. : | 16582-58-4 | MDL No. : | MFCD00996639 |
Formula : | C7H5IN2S | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | WMKLSFIAHMBOTP-UHFFFAOYSA-N |
M.W : | 276.10 | Pubchem ID : | 3524848 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
70% | Stage #1: at 20℃; Cooling with ice Stage #2: With ammonium hydroxide In water |
General procedure: A mixture of 0.1 mol of 4-substituted aniline and 0.1 mol of Potassium thiocyanate (KCNS) in 100 ml glacial acetic acid (AcOH) was cooled in an ice bath and stirred for 10-20 min, and then 0.1 mol bromine in glacial acetic acid was added dropwise at such a rate to keep the temperature below 10 °C throughout the addition. The reaction mixture was stirred at room temperature for 2-4 h, the hydrobromide (HBr) salt thus separated out was filtered, washed with acetic acid, dried, dissolved in hot water and basified to pH 11.0 with ammonia solution (NH4OH) and the resulting precipitate was filtered, washed with water and dried to get the desired product 3a-k. The progress of the reaction was monitored by Thin Layer Chromatography using toluene: acetone (8:2) solvent system. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
73% | With bromine In chloroform for 6 h; Reflux | (0143) Chloroform suspension (7 ml) of 1-(4-iodophenyl)thiourea (889 mg, 3.19 mmol) was added with bromine (328 μl, 6.40 mmol), and heated to reflux and stirred for 6 hours. After the reaction was completed and the solvent was removed, the residue was added with dichloromethane and washed with saturated sodium bicarbonate solution and saturated sodium chloride solution. After the solution was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure, the resulting deposits were filtered to obtain 650 mg 2-amino-6-iodobenzothiazole in a yield of 73percent. |