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:
Jun. 02, 1981
Filed:
Nov. 29, 1979
Heinz Bender, Frankfurt am Main, DE;
Rudi Beyerle, Frankfurt am Main, DE;
Karl-Heinz Keil, Offenbach am Main, DE;
Heinz G Greve, Frankfurt am Main, DE;
Kuno Reh, Frankfurt am Main, DE;
Cassella Aktiengesellschaft, Frankfurt am Main-Fechenheim, DE;
Abstract
The present invention relates to new, pharmacologically valuable 2,4,5,6-tetrahydro-1H-pyrazino-[3,2,1-jk]-carbazoles substituted in the 8-position having the formula I ##STR1## wherein R stands for an alkyl or alkoxy group having 1 to 4 carbon atoms or a fluorine, chlorine or bromine atom comprising reacting a 6,9-disubstituted 1,2,3,4-tetrahydrocarbazol-1-one of the formula II ##STR2## and X denotes a bromine, chlorine or iodine atom or the radical of the formula defined --O--SO.sub.2 --R' and R' is an alkyl radical having 1 to 3 carbon atoms, phenyl or tolyl, with ammonia.