Ishihara Sangyo Kaisha, Ltd.

Tooru Wakabayashi

Fumio Kanamori

Shigehisa Kanbayashi

Tokiya Kimura

Hisayoshi Jonishi

Fumihiro Fukui

Noriyuki Horiuchi

Akimasa Takenaka

A process for producing 1-substituted-2-cyanoimidazole compounds is described, which comprises (1) undergoing a reaction of a compound represented by formula (IV), hydroxylamine or a mineral acid salt thereof, and glyoxal or glyoxime to produce a compound represented by formula (III), (2) undergoing a reaction of the compound represented by formula (III) with thionyl chloride or thionyl bromide in the presence of N,N-dialkylamide to produce a reaction mixture, and then reacting the produced reaction mixture with sulfur chloride to produce a 2-cyanoimidazole compound represented by formula (II), and (3) undergoing a sulfamoylation reaction and an isomerization reaction of the 2-cyanoimidazole compound represented by formula (II) and a compound represented by formula (V) in the presence of at least one base selected from carbonates of alkali metals and bicarbonates of alkali metals and a polar solvent to produce a 1-substituted-2-cyanoimidazole compound represented by formula (I-b). The formulae and substituents formulae are specifically defined in the specification. ##STR1##

Processes for producing 1-substituted-2-cyanoimidazole compounds

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Shiga, Japan

Tooru Wakabayashi