ChemicalBook CAS DataBase List 2,2'-Dithiobis(benzothiazole)

2,2'-Dithiobis(benzothiazole) synthesis

6synthesis methods

Product Name:2,2'-Dithiobis(benzothiazole)
CAS Number:120-78-5
Molecular formula:C14H8N2S4
Molecular Weight:332.49

S-2-Benzothiazolyl 2-amino-alpha-(methoxyimino)-4-thiazolethiolacetate

80756-85-0
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$19.00/1g

120-78-5
493 suppliers
$5.00/10g

Yield:120-78-5 97.5%

Reaction Conditions:

with tetrabutylammomium bromide;ozone in methanol at 44; for 1.5 h;Large scale;Concentration;Temperature;

Steps:

1.3 Example 1.3The preparation of 2,2'-dithiodibenzothiazole from AE-active ester waste

The preparation of 2,2'-dithiodibenzothiazole from AE-active ester waste includes the following steps:A, 1,500 kg of AE-active ester waste was dissolved in 3300 L of methanol, and the catalyst tetrabutyl bromideAmmonium chloride was added, and then the temperature of the reaction system was raised to 44C by heating. Then, 75 kg of ozone was introduced at 9.5 cubic meters /The reaction was carried out at a stirring speed of 90 revolutions per minute for 1.5 h;B, to be a step reaction is completed, stop the introduction of ozone, continue stirring, the system at 44 material insulationAfter 1.5 hours, the cooled brine was cooled to 5 ° C and the cooled system material was passed through a centrifuge at 900 rpmFiltration, collecting solid, and finally in the double cone vacuum dryer with a vacuum 0.09-0.095Mpa, temperature 80-90 ° CThe solid was dried for 4-5 hours to obtain 382 kg of 2,2? -dithiobisbenzothiazole, and the reaction yield was 97.5%.

References:

CN105418536,2016,A Location in patent:Paragraph 0025; 0026; 0027; 0028; 0029