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. 28, 1989
Filed:
Jun. 05, 1987
Applicant:
Inventors:
Gabor Megyeri, Budapest, HU;
Tibor Keve, Budapest, HU;
Lajos Kovacs, Jr, Budapest, HU;
Bela Stefko, Budapest, HU;
Erik Bogsch, Budapest, HU;
Anna Kassia nee Zieger, Budapest, HU;
Ferenc Trischler, Budapest, HU;
Gabor Szepesi, Budapest, HU;
Maria Gazdag, Budapest, HU;
Assignee:
Richter Gedeon Vegyeszeti Gyar Rt., Budapest, HU;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
544346 ; 546 67 ; 546 68 ; 546 69 ; 260694 ;
Abstract
The invention relates to a novel process for the halogenation in 2-position of ergot alkaloids. The process is characterized by that as a halogenating agent a system consisting of dimethylsulfoxide, a trialkylhalosilane or triarylhalosilane and optionally a hydrogen halide is used.