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 substituents in formulae are specifically defined in the specification.
Hal-SO₂N(R¹)R (V)
本发明描述了一种生产 1-取代-2-
氰基
咪唑化合物的工艺,该工艺包括:(1) 将式(IV)代表的化合物、
羟胺或其矿物酸盐与
乙二醛或
乙二醛肟反应,生成式(III)代表的化合物;(2) 在 N,N-二烷基酰胺存在下,将式(III)代表的化合物与亚
硫酰氯或亚
硫酰
溴反应,生成反应混合物、然后将生成的反应混合物与
氯化硫反应,生成由式(II)代表的 2-
氰基
咪唑化合物、和 (3) 在至少一种选自碱
金属
碳酸盐和碱
金属
碳酸氢盐的碱和极性溶剂存在下,使式 (II) 所代表的 2-
氰基
咪唑化合物和式 (V) 所代表的化合物发生
氨基磺酰化反应和异构化反应,生成式 (I-b) 所代表的 1-取代基-2-
氰基
咪唑化合物。式中的取代基在说明书中有具体定义。
Hal-SO₂N(R¹)R (V)