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:
May. 26, 2009
Filed:
Aug. 17, 2005
Datong Tang, Watertown, MA (US);
Yao-ling Qiu, Andover, MA (US);
Heejin Kim, Allston, MA (US);
Yat Sun OR, Watertown, MA (US);
Zhe Wang, Hockessin, DE (US);
Datong Tang, Watertown, MA (US);
Yao-Ling Qiu, Andover, MA (US);
Heejin Kim, Allston, MA (US);
Yat Sun Or, Watertown, MA (US);
Zhe Wang, Hockessin, DE (US);
Enanta Pharmaceuticals, Inc., Watertown, MA (US);
Abstract
The present invention relates generally to novel methods for the synthesis of O-(6-pyrazol-1-yl-pyridin-3-ylmethyl)-hydroxylamine which is an essential reagent in the synthesis of one of the bridged erythromycin derivatives and their respective pharmaceutically acceptable salts in PCT Application WO 03/097659 A1. In particular, the present invention relates to processes and intermediates for the preparation of a compound of formula (Ia):