18233-34-6Relevant academic research and scientific papers
Recycling method of 1-phenyl-5-hydroxytetrazole
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Paragraph 0062-0063; 0068; 0070-0073, (2020/01/12)
The invention discloses a recycling method of 1-phenyl-5-hydroxytetrazole, and belongs to the technical field of medicinal chemistry. The preparation method comprises the following steps: a byproduct1-phenyl-5-hydroxytetrazole generated in preparation process of a rosuvastatin calcium intermediate is converted into 1-phenyl-5-mercaptotetrazole; and meanwhile, the 1-phenyl-5-mercaptotetrazole is further used for preparing a rosuvastatin calcium intermediate or rosuvastatin calcium. According to the method disclosed by the invention, reasonable recycling of the byproduct 1-phenyl-5-hydroxytetrazole is realized, the raw materials are fully utilized, the production cost of rosuvastatin calcium and the intermediate thereof is reduced, and the emission of three wastes is reduced.
An efficient synthesis of 1-substituted 5-bromo-1 H -tetrazoles
Myznikov, Leonid,Dmitrieva, Ulyana,Artamonova, Tatiana,Roh, Jaroslav,Hrabalek, Alexandr,Zevatskii, Yuri
, p. 2029 - 2033 (2013/07/26)
1-Substituted 1H-tetrazole-5-thiols were efficiently converted into the corresponding 1-substituted 5-bromo-1H-tetrazoles by treatment with zinc(II) bromide and 50% hydrogen peroxide or 36% peracetic acid at 70-80 °C. In most cases, the 5-bromotetrazole p
