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CAS No. : | 16582-59-5 | MDL No. : | MFCD01123002 |
Formula : | C7H4Cl2N2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | UZGRZSHGRZYCQV-UHFFFAOYSA-N |
M.W : | 219.09 | Pubchem ID : | 112722 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | 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 |
---|---|---|
Listed below are some typical examples of said 2-aminobenzothiazole compounds: ... 2-amino-6-iodobenzothiazole 2-amino-6-cyanobenzothiazole 2-amino-6-thiocyanobenzothiazole 2-amino-6-methylbenzothiazole 2-amino-4,6-dichlorobenzothiazole 2-amino-4,6-dibromobenzothiazole 2-amino-5,6-dichlorobenzothiazole 2-amino-5,6-dibromobenzothiazole ... |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With bromine; In acetic acid; | 2-Amino-4,6-dichlorobenzothiazole 197 g (1.23 mol) of bromine were slowly added dropwise, while cooling with ice, to a solution of 200 g (1.23 mol) of 2,4-dichloroaniline and 200 g (2.46 mol) of sodium thiocyanate in 1.5 1 of glacial acetic acid. Stirring was carried out for 16 hours at about 20 C., after which the solid was separated off and washed with 10% strength sodium hydroxide solution and water. Yield: 205 g. 1 H-NMR (270 MHz; in d6 -dimethyl sulfoxide): delta [ppm]=7.39 (d,1H), 7.80 (d,1H), 8.00 (s,2H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With tert.-butylnitrite; In 1,2-dichloro-ethane; | 4,6-Dichloro-2-(methylthio)benzothiazole 43.7 g (0.47 mol) of dimethyl disulfide and 154.5 g (1.5 mol) of tert-butyl nitrite were added to a solution of 34 g (0.16 mol) of <strong>[16582-59-5]2-amino-4,6-dichlorobenzothiazole</strong> in 1 liter of 1,2-dichloroethane. Stirring was carried out for 16 hours, followed by washing with water and 10% strength sodium hydroxide solution, drying over magnesium sulfate and evaporating down. Yield: 34 g; mp.: 108 to 110 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With tert.-butylnitrite; sodium bromide;copper(I) bromide; In acetonitrile; | 2-Bromo-4,6-dichlorobenzothiazole 35 g (0.24 mol) of copper(I) bromide and 126 g (1.23 mol) of sodium bromide were added to a solution of 27 g (0.12 mol) of <strong>[16582-59-5]2-amino-4,6-dichlorobenzothiazole</strong> in 0.5 1 of acetonitrile, and 16.5 g (0.16 mol) of tert-butyl nitrite were then added dropwise. Stirring was carried out for 16 hours, after which the reaction mixture was acidified with 10% strength hydrochloric acid. The product was then extracted with methyl tert-butyl ether. The organic phase was washed with water, dried over magnesium sulfate and finally evaporated down. Purification of the crude product was carried out by means of column chromatography over silica gel (eluent: 1:1 cyclohexane/ethyl acetate). Yield: 9.1 g. 1 H-NMR (250 MHz; in d6 -dimethyl sulfoxide): delta [ppm]=7.78 (d,1H), 8.24 (d,1H). |
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