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:
Nov. 10, 1998
Filed:
May. 06, 1997
Applicant:
Inventor:
Gary M Johnson, Elkhart, IN (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
546300 ; 546347 ;
Abstract
The present invention involves the synthetic conversion of pyridinoline (PYD) to deoxypyridinoline (DPD) via an intermediate ester which is subsequently cleaved. The transformation of PYD into a xanthate-type ester intermediate facilitates the subsequent removal of the substituted hydroxyl functionality thus providing the desired DPD. The method provides a new chemical pathway for the preparation of DPD, resulting in significantly increased yields as compared to traditional methods of product isolation.