反应详情

2,3-Dichloroquinoxaline (33.5 g., 0.168 mole) was stirred with hydrazine hydrate (18.5 g., 0.369 mole) in 500 ml. of ethanol at room temperature overnight (i.e.. at ca. 20° C. for approximately 16 hours). The thick, yellow slurry was filtered and the precipitate was washed with ethanol. The precipitated material was recrystallized from hot methanol to give 13.5 g. (41% yield) of 2-chloro-3-hydrazinoquinoxaline, m.p. 181° C. (decomp.). Mass spectrum: m/e, 194 (P).

1. customat room temperature
2. customovernight (i.e.. at ca. 20° C. for approximately 16 hours)
3. filtrationThe thick, yellow slurry was filtered
4. washthe precipitate was washed with ethanol
5. customThe precipitated material was recrystallized from hot methanol
6. customto give 13.5 g