PROCESS FOR PREPARING N-PHENYLPYRAZOLE DERIVATIVES

摘要

N-Phenylprazoles of formula I[R5=R6= 1-4C alkyl, trifluoromethyl, nitro, F, Cl or Br; R7 = H, 1-4C alkyl or alkoxy, cyano, F, Cl or Br; R8 = R9 = H, F, Cl. were prepd. by the ring-closing reaction of formula II. The title compds. are preemergent and post emergent herbicides, and they may be used for selective weed control in cereals, soybeans, barley, etc.