Process for the preparation of 3-isomers of 1-cyclohexyl-2-(1,2,4-triazol-1-yl)-1-penten-3-one derivatives

摘要

The known E-isomers of compounds of the formula <IMAGE> (I) in which X and Y independently of each other represent hydrogen or halogen, are obtained according to a new process, in which triazolylketones of the formula <IMAGE> (I) in which X and Y have the above mentioned meaning, are reacted with an excess of cyclohexanecarbaldehyde in the presence of a non-polar organic diluent and in the presence of a catalyst mixture of organic acids and secondary amines in a molar ratio of 1:0.5 to 1:1 at temperatures between 40 DEG and 100 DEG C. by continuously removing the water formed and subsequently working up in the manner that is described in the specification.