- Catalyst-free visible light-mediated selective oxidation of sulfides into sulfoxides under clean conditions
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A facile and efficient visible-light-mediated method for directly converting sulfides into sulfoxides under clean conditions without using any photocatalysts is reported. This method exhibited favourable compatibility with functional groups and afforded a series of sulfoxides with high selectivity and yields. Moreover, in order to shed more light on such a transformation, detailed mechanism studies were carried out both experimentally and theoretically. The readily accessible, low-cost and eco-friendly nature of the developed method will endow it with attractive applications in chemical synthesis.
- Fan, Qiangwen,Zhu, Longwei,Li, Xuhuai,Ren, Huijun,Wu, Guorong,Zhu, Haibo,Sun, Wuji
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supporting information
p. 7945 - 7949
(2021/11/01)
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- Preparation method for greatly reducing omeprazole impurities B (by machine translation)
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The method B uses fenbendazole as an initial raw material. to remove urea as an oxidizing agent, through an oxidation, decoloring, crystallization procedure to obtain oxafenazole, to replace the present production-used hydrogen peroxide. to react more gently, and higher, safety can greatly reduce the oxfendazole impurity, in China. B. (by machine translation)
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Paragraph 0018-0029
(2020/04/02)
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- 1,5-diphenyl-3-formazancarbonitril parasiticides
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The present invention is directed to the use of 1,5-diaryl-3 -formazancarbonitrile compounds for the control of parasites in vertebrate animals.
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- Process for the preparation of 5-phenylsulfinyl-1H-2-(methoxycarbonylamino)-benzimidazole
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A highly selective, inexpensive and quantitative process is described for the preparation of 5-phenylsulfinyl-1H-2-(methoxycarbonylamino)-benzimidazole (oxfendazole) through reaction of 5-phenylmercapto-1H-2-(methoxycarbonylamino)-benzimidazole with hydrogen peroxide in the presence of one or more aliphatic C1 -C6 -alcohols with addition of a strong, nonoxidizing mineral acid.
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- Method of treating helminthiasis by parenteral administration of sulfoxide derivatives of benzimidazoles
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A method is provided for treating or inhibiting helminthiasis by parenterally administering sulfoxide derivatives of benzimidazoles having the structure STR1 wherein R1 is lower alkyl or phenyl-lower alkyl, and R2 is hydrogen, lower alkyl, halogen, lower alkoxy or nitro. Pharmaceutical compositions for use in the above method are also provided.
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