5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole
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5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole
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CAS No:
97963-62-7
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Formula:
C8H6F2N2OS
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Chemical Name:
5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole
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Synonyms:
2H-Benzimidazole-2-thione,5-(difluoromethoxy)-1,3-dihydro-;5-(Difluoromethoxy)-1,3-dihydro-2H-benzimidazole-2-thione;5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole;5-Difluoromethoxy-2-mercaptobenzimidazole;2-Mercapto-5-difluoromethoxy-1H-benzimidazole;SKA 47
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CAS No:
Characteristics
65.4
2.1
Pale Yellow Solid
1.5±0.1 g/cm3
141-161 °C (decomp)
303.5ºC at 760 mmHg
172.1±30.1 °C
1.644
Safety Information
NONH for all modes of transport
3
R36/37/38
S26-S36
Xi:Irritant
P305 + P351 + P338
H315-H319-H335
5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole Use and Manufacturing
In a mechanical stirrer, Reflux condenser, the thermometer of the four-mouth flask, with lye:Sodium carbonate 6. 6 grams + 20 grams of tap water, Stirring to dissolve, slightly cooling, adding4-difluoromethoxy-o-phenylenediamine 34. 8 g, Stir for 20 min. Heated to 30 ° C, 25-35 ° C20 g of carbon disulfide was added dropwise, Drop finished 30-40 ° C insulation condensation 6h, Continue to heat up to 60-70 ° C insulation 6h, cyclization is complete, add activated carbon decolorization, The filtrate was adjusted to pH 5-6 with sulfuric acid, filtered, washed, dried, 5-difluoromethoxy-2-mercapto-1H-benzimidazole was obtained in an amount of 33.2 g, The yield was 95.4percent based on 4-difluoromethoxy-o-phenylenediamine.
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5-(Difluoromethoxy)-2-mercapto-1H-benzimidazole
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