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:
Sep. 29, 1987
Filed:
May. 30, 1986
Applicant:
Inventors:
Gabor Megyeri, Budapest, HU;
Tibor Keve, Budapest, HU;
Janos Galambos, Budapest, HU;
Lajos Kovacs, Jr, Budapest, HU;
Bela Stefko, Budapest, HU;
Erik Bogsch, Budapest, HU;
Ferenc Trischler, Budapest, HU;
Assignee:
Richter Gedeon Vegyeszeti Gyar RT, Budapest, HU;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544346 ; 260694 ; 546 67 ; 546 68 ; 546 69 ;
Abstract
The invention relates to a novel process for the preparation of 2-bromo-.alpha.-ergocryptine and its acid addition salt by brominating .alpha.-ergocryptine in such a way that the bromination is carried out at room temperature by using a dimethylsulphoxide-hydrogen bromide mixture containing no more 0.02% of water and, if desired, converting the thus-obtained 2-bromo-.alpha.-ergocryptine to an acid addition salt in a known manner.