| abstract |
The present invention describes a process for preparing isoxazoles of the formula Iwhere:R<1 >is hydrogen, C1-C6-alkyl,R<2 >is hydrogen, C1-C6-alkyl,R<3>, R<4>, R<5 >are each hydrogen, C1-C6-alkyl or R<4 >and R<5 >together form a bond,R<6 >is a heterocyclic ring,n is 0, 1 or 2;which comprises preparing an intermediate of the formula VIwhere R<1>, R<3>, R<4 >and R<5 >are each as defined above, followed by halogenation, thiomethylation, oxidation and acylation to give compounds of the formula I.Furthermore, the invention describes novel intermediates for preparing the compounds of the formula I and novel processes for preparing the intermediates. |