| abstract |
A process is described for preparing isoxazoles of the formula I n nwhere the substituents are as defined below: n R 1 is hydrogen, C 1 -C 6 -alkyl, R 2 is C 1 -C 6 -alkyl, R 3 , R 4 , R 5 are hydrogen, C 1 -C 6 -alkyl, or R 4 and R 5 together form a bond, R 6 is a heterocyclic ring, n is 0, 1 or 2; n nwhich comprises preparing an intermediate of the formula VI n nwhere R1, R3, R4 and R5 are as defined above, followed by halogenation, thiomethylation, oxidation and acylation to give compounds of the formula I. Also novel intermediates for preparing the compounds of the formula I and novel processes for preparing the intermediates are described. |