| 摘要 |
In the present invention, there is disclosed a process for preparing 1,5-diaryl-3-substituted pyrazole of the general formula I, wherein Ri1, Ri2, Ri3, a Ri4 are the same or different and are individually selected from a group consisting of hydrogen, alkyl containing 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an amino group, an acetamido group, phenyl, a halo group, a hydroxy group, an alkylsulfonyl containing 1 to 8 carbon atoms, an alkylthio group having 1 to 8 carbon atoms, a nitro group, trifluoromethyl and omega-trifluoromethyl alkoxyl group containing 1 to 8 carbon atoms in the alkoxyl moiety, or where Ri1 and Ri2 or Ri3 and Ri4 taken together with the phenyl group to which they are attached, form a naphthyl or a substituted naphthyl group; said preparation process comprising reacting an ester of the general formula VI, in which Ri1, Ri2, Ri3 and Ri4 are the same as in the general formula I and R represents an alkyl group containing 1 to 8 carbon atoms or aryl with N-methyl hydroxylamine hydrochloride. |
