Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 1033203-41-6, name is 6-Bromopyridine-3,4-diamine. A new synthetic method of this compound is introduced below., COA of Formula: C5H6BrN3
6-Bromopyridine-3,4-diamine (200.0 mg, 1.06 mmol) was added to diethyl oxalate (3.0 mL). The mixture was stirred at 130 C. for 12 hours and then cooled to room temperature. Et2O was added thereto to form a solid. The formed solid was filtered and dried under reduced pressure to obtain brown solid compound of 7-bromopyrido[3,4-b]pyrazine-2,3-diol (195.0 mg, 76%). [1236] 1H-NMR (400 MHz, DMSO-d6); delta: 12.23 (brs, 1H), 12.11 (brs, 1H), 8.09 (s, 1H), 7.05 (s, 1H)
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Reference:
Patent; C&C RESEARCH LABORATORIES; Ho, Pil Su; Yoon, Dong Oh; Han, Sun Young; Lee, Won Il; Kim, Jung Sook; Park, Woul Seong; Ahn, Sung Oh; Kim, Hye Jung; US2014/315888; (2014); A1;,
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