2,5-Pyrazinedicarboxylic acid, 3,6-diamino- synthesis
- Product Name:2,5-Pyrazinedicarboxylic acid, 3,6-diamino-
- CAS Number:203798-34-9
- Molecular formula:C6H6N4O4
- Molecular Weight:198.14
![Pyrimido[4,5-g]pteridine-2,4,7,9(3H,8H)-tetrone, 1,6-dihydro-](/CAS/20210111/GIF/116055-86-8.gif)
116055-86-8
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Yield:203798-34-9 80%
Reaction Conditions:
with sodium hydroxide in lithium hydroxide monohydrate at 180; for 5 h;Reagent/catalyst;Temperature;
Steps:
11.3; 12.3; 13.3; 14 Step 3:
The solid of 50 g pyrimido[4,5-g]pteridine-2,4,7,9(1H,3H,6H,8H)-tetraone was added to 400 mL of water, followed by sodium hydroxide aqueous solution (50 g, 500 mL) ).The resulting mixture was heated to 180° C. and reacted for 5 h, and a needle-like solid was precipitated.The reaction mixture was cooled, then filtered, and the resulting precipitate was filtered off with suction, washed with 1N hydrochloric acid, and dried to give 31.9 g of 3,6-diaminopyrazine-2,5-dicarboxylic acid (purity: 99%, yield) as a solid. rate: 80%).
References:
WO2022/96015,2022,A1 Location in patent:Page/Page column 24-27
203798-32-7
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