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:
Jul. 04, 2000
Filed:
May. 15, 1998
Applicant:
Inventors:
Robert F Keyes, Kenosha, WI (US);
Hemant H Patel, Gurnee, IL (US);
Ramiya H Premchandran, Gurnee, IL (US);
Albert V Thomas, Libertyville, IL (US);
Anne H Kemp, Palatine, IL (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07H / ; C07H / ;
U.S. Cl.
CPC ...
536-72 ; 536 185 ;
Abstract
The claimed invention relates to a novel process of preparing N-demethyl-N-alkyl-4'-deoxy erythromycin A and B. The process comprises protecting the 2'-hydroxy or the 2'- and 11-hydroxy of a N-demethyl-4'-deoxy erythromycin derivative having the formula: ##STR1## where R.sub.b is H or OH, with a silyl protecting group and alkylating the N-position of the desosamine sugar.