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:
Mar. 02, 1993
Filed:
Mar. 03, 1992
Stuart J Mickel, Lausen, CH;
Georg von Sprecher, Oberwil, CH;
Ciba-Geigy Corporation, New York, NY (US);
Abstract
Compounds of the formula I ##STR1## wherein either R.sub.1 is halogen, R.sub.1 ' is halogen or hydrogen and R.sub.2 and R.sub.2 ' denote hydrogen or R.sub.1 and R.sub.1 ' represent hydrogen, R.sub.2 is an aliphatic or aromatic radical and R.sub.2 ' is hydroxy or R.sub.2 and R.sub.2 ' together represent oxo, and wherein R denotes an aliphatic, cycloaliphatic, cycloaliphatic-aliphatic or araliphatic radical having 2 or more carbon atoms or, if R.sub.1 and R.sub.1 ' denote hydrogen, R.sub.2 represents an aromatic radical and R.sub.2 ' is hydroxy, R represents methyl, and their salts are useful as nootropics, antidepressants and/or anxiolytics. The can be manufacture by replacing any group R.sub.5 by hydrogen and/or converting any group Z.sub.0 into amino in a compound of formula II ##STR2## in which R, R.sub.1, R.sub.1 ', R.sub.2 and R.sub.2 ' have their previous significances, Z represents a protected or latent amino group Z.sub.0 and R.sub.4 denotes hydrogen or a hyddroxy-protective group R.sub.5, and wherein amino as a constituent of R and/or hydroxy R.sub.2 ' or oxo R.sub.2 +R.sub.2 ' may be present in a temporarily protected form.