95-31-8Relevant articles and documents
Method for preparing sulfenamide rubber vulcanization accelerator by heterogeneous catalysis of oxidation of molecular oxygen
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Paragraph 0022-0024; 0026, (2021/08/07)
The invention relates to a method for preparing a sulfenamide rubber vulcanization accelerator by heterogeneous catalysis of oxidation of molecular oxygen, and belongs to the field of chemical engineering. The method adopts heterogeneous metal cobalt-based nano material as a catalyst, in an oxygen or air environment, a sulfydryl compound and amine are reacted for 0.5-16 hours in an organic phase under the conditions that the atmospheric pressure is 1-7 and the temperature is 40-100 DEG C to prepare the sulfenamide rubber vulcanization accelerator. The catalyst has the characteristics of high catalytic activity, high reaction efficiency, low cost, easiness in obtaining and reusability; and the sulfenamide synthesis steps are simple, the conversion rate is high, byproducts are few, and the method is more suitable for industrial production.
Scalable electrochemical oxidant-and metal-free dehydrogenative coupling of S-H/N-H
Tang, Shanyu,Liu, Yan,Li, Longjia,Ren, Xuanhe,Li, Jiao,Yang, Guanyu,Li, Heng,Yuan, Bingxin
supporting information, p. 1370 - 1374 (2019/02/14)
A practical and scalable electrochemical oxidation of S-H and N-H was developed. This oxidant- and catalyst-free electrochemical process enables S-N bond formation with inexpensive nickel electrodes in an undivided cell. This procedure exhibits broad substrate scopes and good functional-group compatibility. A 50 g scale oxidative coupling augurs well for industrial applications.
Preparation method of N-tert-butyl-2-benzothiazolesulfenamide
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Paragraph 0071; 0073; 0074; 0076; 0078; 0080; 0082; 0084, (2018/06/26)
The invention provides a preparation method of N-tert-butyl-2-benzothiazolesulfenamide, and relates to the technical field of rubber vulcanization accelerators. The preparation method of the N-tert-butyl-2-benzothiazolesulfenamide comprises the following steps: mixing 2-mercaptobenzothiazole, tert-butylamine and a catalyst; then, introducing oxygen; reacting to obtain the N-tert-butyl-2-benzothiazolesulfenamide, wherein the catalyst is a tetraphenylporphyrin metal complex. By adopting the method, toxic or dangerous oxidizing agents do not need to be used, an oxidizing effect can be achieved bytaking oxygen as an oxidizing agent under the catalytic action of the catalyst, and the generation of waste water is avoided; the preparation method has the advantages of low oxidizing agent cost andclean production.