Heterocyclic esters of alkylphenyl benzopyrans

Abstract

Heterocyclic esters of benzopyrans represented by the formula ##STR1## wherein n is 1 or 2; each R and R.sub.1 are the same or different members of the group consisting of hydrogen or loweralkyl; R.sub.2 is loweralkyl; R.sub.3 is ##STR2## WITH Y' being a straight or branched chain alkylene group having from one to eight carbon atoms, a is an integer from 1 to 4, b is an integer from 1 to 4, X is CH.sub.2, O, S or NR.sub.7 with R.sub.7 being hydrogen or loweralkyl, with the limitation that when X is O, S, or NR.sub.7, a and b each must be 2; R.sub.8 is hydrogen or loweralkyl; Y is a straight or branched chain alkylene group having from one to ten carbon atoms; and each R.sub.4 and R.sub.5 and R.sub.6 are the same or different members of the group consisting of hydrogen, halo, trifluoromethyl or loweralkyl; and the pharmaceutically acceptable salts thereof.

Dependencies are inferred from the claim text.