反应详情

Potassium hydroxide (660 mg) is dissolved in 25 cc of methanol and 1.66 g of 4-(2-furanyl)-4-oxo-2-butenoic acid is added. Hydrazine (320 mg) is then added and the solution is refluxed for 2 hours. The methanol is removed and the viscous residue is dissolved in 50 cc of water. The solution is made strongly acid with 20% HCl and a precipitate forms. The solid is filtered quickly to yield 1.2 g of the title compound, melting point 185°-190° C., dec.

1. temperaturethe solution is refluxed for 2 hours
2. customThe methanol is removed
3. dissolutionthe viscous residue is dissolved in 50 cc of water
4. filtrationThe solid is filtered quickly