The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1980
Filed:
Jun. 16, 1978
Parthasarathi Rajagopalan, Westbury, NY (US);
Endo Laboratories, Inc., Garden City, NY (US);
Abstract
##STR1## where X is O, S, S.fwdarw.O, or SO.sub.2 ; n is 0 or 1; m is 0 or 1; the R's are the same or different and are H or CH.sub.3, and one of them can be C.sub.2 -C.sub.9 alkyl, phenyl, C.sub.7 -C.sub.10 phenylalkyl, furyl, thienyl, pyridyl or substituted phenyl or phenylalkyl; when X is S, and m is 0, one R in the group --RCR-- can be OCH.sub.3 ; when X is S and m is 1, the R in the group (CHR).sub.m can be OCH.sub.3 ; and R.sup.1 is H, C.sub.1 -C.sub.4 alkyl, C.sub.3 -C.sub.5 alkenyl, C.sub.3 -C.sub.5 alkynyl, C.sub.3 -C.sub.6 cycloalkyl, C.sub.2 -C.sub.4 alkoxycarbonyl, trifluoroacetyl, or substituted C.sub.1 -C.sub.4 alkyl where the substituent is C.sub.3 -C.sub.6 cycloalkyl, phenyl or substituted phenyl; and their pharmaceutically suitable salts. The compounds are useful as sedatives; some of them also exhibit antidepressant, antihypertensive and antibacterial activity. The compounds are prepared by cyclizing compounds of formula II ##STR2## wherein R.sup.2 is R.sup.1 or acyl. The latter compounds are prepared by reacting 4-piperidones with compounds of formula III in the presence of a reducing agent ##STR3## or with compounds of formula VI ##STR4##