Title:
METHOD FOR PREPARING 3,6-DIAMINOPYRAZINE-2,5-DICARBOXYLIC ACID AND SYNTHETIC INTERMEDIATE THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/096015
Kind Code:
A1
Abstract:
A method for preparing a 3,6-diaminopyrazine-2,5-dicarboxylic acid and a synthetic intermediate thereof. The method comprises the step of preparing pyrimido[4,5-g]pteridine-2,4,7,9 (1H,3H,6H,8H)-tetrone or a disalt (pteridine) thereof from 5-aminouracil or a single salt thereof.
Inventors:
ZHENG JUNHAO (CN)
HONG XUMING (CN)
ZHANG DUQIAN (CN)
ROGERS THOMAS E (US)
CACCHILLO ELENA (US)
HONG XUMING (CN)
ZHANG DUQIAN (CN)
ROGERS THOMAS E (US)
CACCHILLO ELENA (US)
Application Number:
PCT/CN2021/129540
Publication Date:
May 12, 2022
Filing Date:
November 09, 2021
Export Citation:
Assignee:
HANGZHOU ZHONGMEIHUADONG PHARMACEUTICAL CO LTD (CN)
MEDIBEACON INC (US)
MEDIBEACON INC (US)
International Classes:
C07D475/02; C07D241/28
Foreign References:
| DE102016205615A1 | 2017-02-23 | |||
| CN101087767A | 2007-12-12 | |||
| DE102016205615A1 | 2017-02-23 |
Other References:
BAUDISCH OSKAR, DAVID DAVIDSON: "THE OXIDATION OF S-AMINOURACIL", ANN. CHEM. (JOURNAL OF BIOLOGICAL CHEMISTRY), vol. 71, no. 2, 1 January 1927 (1927-01-01), pages 497 - 499, XP055928482
DYES AND PIGMENTS, vol. 39, 1998, pages 49 - 68
DYES AND PIGMENTS, vol. 41, 1999, pages 183 - 191
DYES AND PIGMENTS, vol. 39, 1998, pages 49 - 68
DYES AND PIGMENTS, vol. 41, 1999, pages 183 - 191
Attorney, Agent or Firm:
NTD UNIVATION INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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