6863-73-6,Some common heterocyclic compound, 6863-73-6, name is 3-Chloropyrazin-2-amine, molecular formula is C4H4ClN3, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
A mixture of 25 (5.20 g, 40.1 mmol) and CuSO4 (640 mg, 4.01 mmol) in 12 M methanamine aqueous solution (40.0 mL, 480 mmol) was stirred at 120 C for 3 h under microwave irradiation. The reaction mixture was allowed to cool to room temperature and concentrated in vacuo. The residue was purified by flash column chromatography (silica gel, 0-5% MeOH in CHCl3) to give 26 (3.99 g, 80%) as a yellow solid. 1H NMR (DMSO-d6) delta 2.81 (d, 3H, J = 4.7 Hz), 5.84 (s, 2H), 6.13 (q, 1H, J = 4.7 Hz), 7.09 (d, 1H, J = 3.1 Hz), 7.23 (d, 1H, J = 3.1 Hz); MS (ESI) m/z 125 [M+H]+.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-Chloropyrazin-2-amine, its application will become more common.
Reference:
Article; Chino, Ayaka; Masuda, Naoyuki; Amano, Yasushi; Honbou, Kazuya; Mihara, Takuma; Yamazaki, Mayako; Tomishima, Masaki; Bioorganic and Medicinal Chemistry; vol. 22; 13; (2014); p. 3515 – 3526;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem