反应详情

A stirred suspension of 2-cyanoacetamide (790 mg, 9.40 mmol) in absolute ethanol (40 ml) was treated with sodium methoxide (495 mg, 9.16 mmol) and refluxed 10 minutes. The mixture was cooled slightly, a solution of 4-chloro-3-cyanobenzyl azide (1.35 g, 7.01 mmol) in absolute ethanol (10 ml) was added in one portion, and the mixture was refluxed 2.5 hours. The mixture was filtered hot, the solid was washed with absolute ethanol, and the combined filtrate and wash were evaporated to dryness under vacuum. The residue was triturated with diethyl ether, filtered, and washed twice with diethyl ether. The solid was recrystallized from methanol (6 ml) and dried at 65° C. under vacuum to provide 635 mg (24%) 5-amino-1-(4-chloro-3-cyanobenzyl)-1,2,3-triazole-4-carboxamide, m.p. 172°-175° C.

1. temperaturerefluxed 10 minutes
2. temperatureThe mixture was cooled slightly
3. temperaturethe mixture was refluxed 2.5 hours
4. filtrationThe mixture was filtered hot
5. washthe solid was washed with absolute ethanol
6. washthe combined filtrate and wash
7. customwere evaporated to dryness under vacuum
8. customThe residue was triturated with diethyl ether
9. filtrationfiltered
10. washwashed twice with diethyl ether
11. customThe solid was recrystallized from methanol (6 ml)
12. customdried at 65° C. under vacuum