Richter Gedeon Vegyeszeti Gyar Rt

Andras Sugar

Janos Kiss

Karoly Molnar

Istvan Polgar

Jozsef Foldesi

Istvan Gebhardt

Tamas Szen

Endre Gulyas

Katalin Balogh Nee Nemes

Piroska Major Nee Forstner

Imre Godla

Ferenc Konok

Zoltan Marina

Pal Angyal

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.

Steroselective hydrogenation process

A Raney catalyst composition which has ice as a solid carrier. The reaction involving the Raney catalyst of the invention is carried out by portionwise adding a Raney catalyst containing ice as solid carrier to the reaction mixture. The operation-safe cylindrical or angular vessel used for the storage and/or handling of the Raney catalyst has a conical casing or side walls joining to the bottom through a bend radius of greater than 0.5 mm. The vessel is covered by a tightly closing cap.

Reliable Raney catalyst composition and vessel for containing same

Growing community of inventors

Budapest, Hungary

Andras Sugar