Electric Literature of 95-89-6, These common heterocyclic compound, 95-89-6, name is 3-Chloro-2,5-dimethylpyrazine, its 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. 3,6-Dimethylpyrazin-2-amine A 100 mL autoclave vessel was charged with 3-chloro-2,5-dimethylpyrazine (25.0 g, 176 mmol), NH3 (aq. 25-28% w/w, 80 mL) and Cu powder (1.69 g, 26.4 mmol) and the autoclave vessel was sealed. The resulting mixture was heated to 150 C. and stirred vigorously for 48 h. The reaction mixture was cooled to room temperature and concentrated under reduced pressure. The residue was diluted with brine (100 mL) and extracted with EtOAc (4*100 mL). The combined extracts were dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was washed with PE to render the title compound as a light yellow solid (17.6 g, yield 81%). ESI MS: m/z 124 [M+H]+.
The synthetic route of 95-89-6 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Sunovion Pharmaceuticals Inc.; US2012/178748; (2012); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem