Toyo Kasei Kogyo Company Limited

Kiyoto Koguro

Sunao Mitsui

Ryozo Orita

Toshikazu Oga

Norihito Tokunaga

Kazutake Hagiya

Yasuhiro Sato

The present invention relates to a process for producing an N-aryl-2,2,2-trifluoroacetimidoyl chloride represented by Formula (2): the process comprising the step of reacting in an organic solvent a tertiary amine, a 2,2,2-trifluoro-N-arylacetamide represented by Formula (1): and at least one member selected from the group consisting of phosphorus oxychloride and diphenyl chlorophosphate; and a process for producing a 1-aryl-5-(trifluoromethyl)-1H-tetrazole represented by Formula (4): the process comprising the step of reacting in an aromatic hydrocarbon solvent, in the presence of an amine salt, an N-aryl-2,2,2-trifluoroacetimidoyl chloride represented by Formula (2) shown above and an azide.

Process for production of 1-aryl-5-(trifluoromethyl)-1H-tetrazoles

The invention is directed to a process for preparing a 5-substituted tetrazole, the process comprising the step of reacting a nitrile with an inorganic azide salt in an aromatic hydrocarbon solvent in the presence of an amine salt. According to the invention, a 5-substituted tetrazole can be produced in a high yield with ease and safety using inexpensive raw materials while the reaction is easily controlled to inhibit a side reaction.

Process for preparation of a 1-(tetrazolylbiphenylmethyl)-imidazole

Process for preparation of 5-  substituted tetrazoles

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Takasago, Japan

Kiyoto Koguro