PURPOSE: To simply obtain the titled compound in high yield, by reacting a reaction product of an aromatic carboxylic acid derivative and hydroxylamine with a halogenoacetic acid in the presence of a metal hydroxide or metal carbonate and then hydrolyzing the resultant product in a mineral acid.

CONSTITUTION: A compound expressed by formula I (R1 is H, alkyl, aryl, alkoxy, NO2 or halogen; n is integer of 1W5; R2 is alkoxy or halogen) is reacted with a hydroxylamine to afford a compound expressed by formula II, which is then reacted with a compound expressed by formula III (X is I, Br or Cl) in the presence of a metal hydroxide or metal carbonate to give a compound expressed by formula IV, which is further hydrolyzed in a mineral acid to provide the aimed compound expressed by formula V (A is HI, HBr, HCl or 1/2 H2SO4) useful as an intermediate for medicine or agricultural chemical from an inexpensive raw material capable of industrially and readily available in simple reaction treatment and good yield. Further more, the above-mentioned process has excellent economical efficiency and is suitable in industrial production, because the unreacted above-mentioned raw material can be recovered in high yield after reaction and re-utilized.