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. 26, 2019
Filed:
Aug. 01, 2019
Applicant:
Development Center for Biotechnology, Taipei, TW;
Inventors:
Assignee:
DEVELOPMENT CENTER FOR BIOTECHNOLOGY, Taipei, TW;
Primary Examiner:
Int. Cl.
CPC ...
C07D 241/52 (2006.01); C07D 241/44 (2006.01);
U.S. Cl.
CPC ...
C07D 241/44 (2013.01); C07D 241/52 (2013.01);
Abstract
A regioselective one-step process for the synthesis of 2-hydroxyquinoxaline of Formula (1) or tautomers thereof: comprising reacting 1,2-phenylenediamine of Formula (2): with an excess amount of glyoxylic acid, glyoxylic acid monohydrate, or a 2,2-dialkoxyacetic acid of Formula (3): at a low temperature;wherein Rand Rare as defined in the specification.