Reaktion #2044544

Reaktionsgleichung

hydrazine hydrate

3,4-dimethyl-1-(pyridin-3-ylmethyleneamino)-2,3-dihydroimidazol-2-one

→

1-Amino-3,4-dimethyl-1,3-dihydroimidazol-2-one

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturunder reflux for 6 hours
2. 2
   Einengenconcentrated by evaporation
3. 3
   Sonstigechromatographed on silica gel
4. 4
   Sonstigeare thus obtained

Vorschrift

2 g of hydrazine hydrate are added to a solution of 2 g of 3,4-dimethyl-1-(pyridin-3-ylmethyleneamino)-2,3-dihydroimidazol-2-one in 12 ml of methanol and the suspension is boiled under reflux for 6 hours, then concentrated by evaporation and chromatographed on silica gel. 1 g of pyridine-3-carbaldehyde hydrazone and 0.7 g of the title compound having a melting point of 115°-119° are thus obtained.

Quelle