| 摘要 |
PCT No. PCT/EP96/00011 Sec. 371 Date Jul. 3, 1997 Sec. 102(e) Date Jul. 3, 1997 PCT Filed Jan. 4, 1996 PCT Pub. No. WO96/21650 PCT Pub. Date Jul. 18, 1996A process for preparing 3,5-diarylpyrazoles of the general formula I <IMAGE> I where the substituents have the following meanings: R1 and R3 are unsubstituted or substituted aryl radicals, R2 is hydrogen, C1-C8-alkyl or unsubstituted or substituted aryl, in which hydrazine hydrate is reacted with a 1,3-diarylpropenone of the general formula II <IMAGE> II where the substituents R1, R2 and R3 have the abovementioned meanings, in sulfuric acid in the presence of iodine or an iodine compound, is described. |
