Réaction #1655

Équation de réaction

3-(4-chlorobenzoyl)propionic acid

hydrazine monohydrate

→

6-(4-chlorophenyl)-4,5-dihydropyridazinone

Rendement 81.5%

Solvants

ethanol

Conditions de réaction

Traitement

1. 1
   AutreA thick solid was formed which
2. 2
   workup.DISSOLUTIONdissolved
3. 3
   Températureafter heating
4. 4
   TempératureThe resulting solution was refluxed for 3 h
5. 5
   Températurecooled
6. 6
   Autrethe solid formed
7. 7
   Filtrationfiltered
8. 8
   Autredried

Mode opératoire

To a solution of 3-(4-chlorobenzoyl)propionic acid (20 g) in absolute ethanol (200 ml) was added 5 g of hydrazine monohydrate. A thick solid was formed which dissolved after heating. The resulting solution was refluxed for 3 h, cooled and the solid formed filtered and dried to yield 16 g (80%) of 6-(4-chlorophenyl)-4,5-dihydropyridazinone.

Source