Disclosed is a novel acid halide derivative represented by Formula (I):
##STR1##
wherein X and Y may be the same or different and are each a halogen atom;
and R is a lower alkyl group. By cyclizing the acid halide derivative of Formula
(I) in the presence of a catalyst, an indanonecarboxylic acid ester represented
by Formula (VI):
##STR2##
wherein X and R are as defined above, is produced. Such indanonecarboxylic
acid esters are useful as intermediates for insecticides.
