反应详情

A solution of 6.43 gm (0.06 mole) of 4-pyridinecarboxaldehyde, 11.31 gm (0.06 mole) of phenyl carbazate hydrochloride and 300 ml of 95% ethanol is refluxed 4 hr. The reaction mixture is evaporated to dryness. The crude product is suspended in 200 ml of boiling absolute ethanol and sufficient methanol added to give a solution. The hot solution is filtered, the filtrate cooled to room temperature and then chilled in the freezer. The crystals are collected, washed with Skellysolve B and dried to yield 11.0 gm (66%) of the title compound having a melting point of 224.4° C. (decomp).

1. customThe reaction mixture is evaporated to dryness
2. additionadded
3. customto give a solution
4. filtrationThe hot solution is filtered
5. temperaturechilled in the freezer
6. customThe crystals are collected
7. washwashed with Skellysolve B
8. customdried