Production of e-isomer of triazolylstyryl ketone derivative
专利汇可以提供Production of e-isomer of triazolylstyryl ketone derivative专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the E-isomer of high grade without containing by-products, etc., by reacting the Z-isomer of the titled compound with sulfuric acid and an isomerization catalyst in an organic solvent, depositing the formed E-isomer sulfate as crystals, separating the crystals and decomposing the separated crystals.
CONSTITUTION: The Z-isomer which may contain the E-isomer of 1-(2,4- dichlorophenyl)-2-( 1, 2, 4-triazol-1-yl )-4,4-dimethyl-1-penten-3-one (triazolylstyryl ketone derivative) expressed by formula I is reacted with sulfuric acid (≥40wt%, preferably ≥90wt% concentration) and an isomerization catalyst, e.g. a com pound capable of forming halonium ions such as bromine or iodine, in an organic solvent to carry out isomerization and formation of the E-isomer sulfate at the same time. The resultant sulfate is separated as crystals, which are then decomposed. Thereby the E-isomer having better efficary than that of a compound expressed by formula II, obtained by reducing the compound expressed by formula I and useful as a germicide, herbicide and plant growth regulator can be efficiently obtained.
COPYRIGHT: (C)1987,JPO&Japio，下面是Production of e-isomer of triazolylstyryl ketone derivative专利的具体信息内容。
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