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. 17, 1992
Filed:
Jun. 22, 1990
Istvan Polgar, Budapest, HU;
Jozsef Foldesi, Budapest, HU;
Janos Kiss, Budapest, HU;
Piroska Major nee Forstner, Budapest, HU;
Karoly Molnar, Budapest, HU;
Andras Sugar, Budapest, HU;
Tamas Szen, Budapest, HU;
Katalin Balogh nee Nemes, Budapest, HU;
Richter Gedeon Vegyeszeti Gyar R.T., Budapest, HU;
Abstract
The invention relates to a novel stereoselective process for the preparation of dihdyrolysergol from lysergol by hydrogenation in the presence of solvent and palladium catalyst applied on a carrier, which comprises hydrogenating lysergol in the presence of one or more aprotic solvent(s) containing tertiary nitrogen atom(s) and a palladium catalyst applied on activated carbon, and recovering the product obtained from the reaction mixture in a known manner.