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:
Feb. 06, 2001
Filed:
May. 26, 1998
Applicant:
Inventors:
Robin Mark Bannister, Cambridge, GB;
Raymond McCague, Cambridge, GB;
Assignee:
Janssen Pharmaceutica, N.V., , BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P 1/718 ; C07D / ; A61K 3/578 ;
U.S. Cl.
CPC ...
C12P 1/718 ; C07D / ; A61K 3/578 ;
Abstract
The subject invention pertains to a process for preparing a compound having a formula (4) or (5), in either optically-enriched or racemic form, wherein R,, R,, R,and R,are independently selected from hydrogen, alkyl, aryl, alkaryl, aralkyl and acyl groups. In one embodiment, the process of the invention comprises mixing with a plant extract obtained from crushed daffodil bulbs or crushed snowdrop bulbs an oxidative cyclisation precursor of the compound.