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.
本发明涉及一种新型苯并
吡喃酸酯,其
化学式为:##
SPC1## 其中,R和R'为氢或C.sub.1-C.sub.6烷基,当烷基在同一或不同碳上时;R.sub.1为C.sub.1-C.sub.6烷基;R.sub.2为C.sub.1-C.sub.20烷基,较低的环烷基较低的烷基或较低的环烷基;n为3至7的整数,特别是3至5;Y为直链或支链C.sub.1-C.sub.8烷基;R.sub.3为##EQU1## 其中,A为1至4的整数,B为1至4的整数,X为O、S、CH.sub.2或NR.sub.4,R.sub.4为氢C.sub.1-C.sub.6烷基,R.sub.5为氢或C.sub.1-C.sub.6烷基;以及其酸盐加合物。这些化合物表现出镇痛和中枢神经系统活性。