Process for preparation of 44benzolpyrazoles

PURPOSE:4-Benzolpyrazole derivatives of formula I(where R1 is lower alkyl or lower alkenyl; R2 is lower alkyl; X is halogen or lower alkyl; n is 1-3, when n is 2 or 3, X may be the same or different); wherein, the compound in which R1 and R2 are methyl and Xn is 2-chloro, is known.