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:
Oct. 19, 1976
Filed:
Dec. 11, 1975
Applicant:
Inventors:
Arthur J Zambito, Rahway, NJ (US);
Paul Davis, Metuchen, NJ (US);
Assignee:
Merck & Co., Inc., Rahway, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 424250 ;
Abstract
This invention relates to the process for the purification of 3,6-bis(5-chloro-2-piperidinyl)-2,5-piperazinedione dihydrochloride, also known as Compound 593A, obtained as the free base from the fermentation broth of a strain of Streptomyces griseoluteus designated as NRRL 3412 by adsorbtion of the compound on a resin comprising a nonionic macro porous copolymer of styrene cross-linked with divinylbenzene. The resin is eluted with an organic aqueous dilute mineral acid solvent mixture in which the adsorbed compound is soluble. The compound is extracted from the eluate and further purified by fractional crystallization.