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:
Feb. 14, 1995
Filed:
Jan. 10, 1991
Gregory M Shutske, Somerset, NJ (US);
Richard C Effland, Bridgewater, NJ (US);
Hoechst-Roussel Pharmaceuticals Incorporated, Somervilee, NJ (US);
Abstract
There are disclosed compounds having the formula ##STR1## wherein n is 1-4; R is hydrogen, loweralkyl or loweralkylcarbonyl; R.sub.1 is hydrogen, loweralkyl, loweralkylcarbonyl, aryl, diloweralkylaminoloweralkyl, arylloweralkyl, diarylloweralkyl, oxygen-bridged arylloweralkyl, or oxygen-bridged diaryllowerallyl; A is a direct bond or (CHR.sub.3).sub.m, m being 1-3; X is hydrogen, loweralkyl, cycloalkyl, loweralkoxy, halogen, hydroxy, nitro, trifluoromethyl, formyl, loweralkylcarbonyl, arylcarbonyl, --SH, loweralkylthio, --NHCOR.sub.4 or --NR.sub.5 R.sub.6, R.sub.4 being hydrogen or loweralkyl, and R.sub.5 and R.sub.6 being independently hydrogen, loweralkyl or cycloalkyl; Y is O, S or NR.sub.7 ; and each R.sub.2, each R.sub.3 and R.sub.7 are independently hydrogen or loweralkyl, or taken two at a time form a methylene or ethylene group constituting a part of a ring of at least five atoms; stereo, optical and geometrical isomers thereof, and pharmaceutically acceptable acid addition salts thereof, which are useful for enhancing memory.