Heterocyclic esters of benzopyrans

Abstract

This invention relates to novel esters of benzopyrans represented by the formulae ##SPC1## Wherein R and R' are hydrogen or C.sub.1 -C.sub.6 alkyl and when alkyl are on the same or different carbons; R.sub.1 is C.sub.1 -C.sub.6 alkyl; R.sub.2 is C.sub.1 -C.sub.20 alkyl, lowercycloalkyloweralkyl or lowercycloalkyl; n is an integer from 3 to 7, and particularly 3 to 5; Y is a straight or branched chain C.sub.1 -C.sub.8 alkylene; and R.sub.3 is ##EQU1## WHEREIN A IS AN INTEGER FROM 1 TO 4, B IS AN INTEGER FROM 1 TO 4, X is O,S, CH.sub.2 or NR.sub.4 and R.sub.4 is hydrogen C.sub.1 -C.sub.6 alkyl, and R.sub.5 is hydrogen or C.sub.1 -C.sub.6 alkyl; and the acid addition salts thereof. The compounds exhibit analgesic and central nervous system activity.

Dependencies are inferred from the claim text.