A process for a mono carbonylation of a benzenediol of the formula (I) is characterized
in that a benzene diol of the formula (II) is reacted with an acid anhydride or
carbonyl halide of the formula (III) without any organic or inorganic bases for
thereby producing a monocarbonylated benzenediol of the formula (I):
##STR1##
wherein R is hydrogen, C1-C15 alkyl group, cycle alkyl
group, aryl group, alkoxy group, aryloxy group, dialkylamino group, alkylarylamino
group or diarylamino group, and X is a general leaving group such as fluoride,
chloride, bromide, iodide, acetoxy, etc.
