ChemicalBook CAS DataBase List Benzothiazole

Benzothiazole synthesis

14synthesis methods

Product Name:Benzothiazole
CAS Number:95-16-9
Molecular formula:C7H5NS
Molecular Weight:135.19

By refluxing a mixture of zinc o-aminophenylsulfide and formic acid, followed by steam distillation of the alkalized reaction mixture; by heating formanilid or dimethylaniline with sulfur; by oxidation of 2-mercaptobenzothiazole or of the corresponding disulfide.

103-72-0
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95-16-9
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$14.14/10gm:

Yield:95-16-9 97%

Reaction Conditions:

with indium(III) trichloride in acetonitrile at 80; for 4 h;

Steps:

1 Example 1

Acetonitrile (40 ml) and phenyl isothiocyanate (2.70 g, 20 mmol) were successively added to the reactor equipped with a thermometer and a reflux condenser, and indium trichloride (8.85 g, 40 mmol) was added to the reactor at one time, The temperature of the reaction system rose to 80°C, the boiling point of acetonitrile, and refluxed for 4 hours after the indium trichloride was completely dissolved. The filtrate was collected by filtration, and the solvent in the filtrate was evaporated by a rotary evaporator to obtain the crude product. The obtained crude product was recrystallized with ethyl acetate, and the white solid therein was filtered off with suction to obtain 2.62 g of polycarbonate anti-high temperature degradation agent A with a yield of 97%.

References:

CN114516848,2022,A Location in patent:Paragraph 0038-0041

136-95-8 Synthesis