申请人:Siegfried Aktiengesellschaft
公开号:US04554356A1
公开(公告)日:1985-11-19
A process for the manufacture of imidazolylvinyl ethers of the formula ##STR1## wherein Im represents the substituted or unsubstituted 1-H-imidazol-1-yl group and An, R and Y are defined hereinbelow by condensation of a corresponding ketone of the formula Ar--CO--CHR--Im (II) with the splitting-off of a Z group, with a condensable substance of the formula Z--Y (III) in the aqueous solution of a strong inorganic base, preferably in concentrated aqueous soda lye. The reaction may also be carried out in the presence of a second liquid organic phase, preferably benzene or toluene, especially in the presence of a phase transfer catalyst in this case. Through careful crystallization of the product manufactured according to this method, it is possible to manufacture approximately pure E-isomers of the imidazolylvinyl ether of formula (I), without the requirement of chromatographic separation.
一种制备式为##STR1##的咪唑基乙烯醚的方法,其中Im代表取代或未取代的1-H-咪唑基团,An、R和Y的定义如下:通过相应的酮Ar--CO--CHR--Im (II)与脱除Z基团的可缩合物Z--Y (III)在强无机碱的水溶液中缩合,首选在浓缩的苛性钠溶液中。该反应也可以在第二液态有机相的存在下进行,首选苯或甲苯,尤其是在这种情况下存在相转移催化剂。通过对根据该方法制备的产品进行精心结晶,可以制备近乎纯的式为(I)的咪唑基乙烯醚的E异构体,而无需色谱分离的要求。