| abstract |
A process for the preparation of crystalline modification 1 of N- (4-trifluoromethylphenyl) -5-methylisoxazole-4-carboxamide of formula I, which consists in heating crystalline modification 2 of a compound of formula I or a mixture of crystalline modification 1 and crystalline modification 2 of a compound of formula I in the solid state at a temperature of 40 to 130 ° C. |