Reaktion #1519103

Reaktionsgleichung

3-(4-chloropyrid-2-yl)-3-oxopropionic acid ethyl ester

2-amidinopyridine hydrochloride

sodium hydroxide

→

6-(4-chloropyrid-2-yl)-2-pyrid-2-yl-pyrimidin-4-ol

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturrefluxing
2. 2
   TemperaturThe mixture is cooled
3. 3
   Einengenconcentrated to a fifth of its original volume
4. 4
   FiltrationThe crude product is filtered off
5. 5
   Sonstigerecrystallised from methanol

Vorschrift

13.15 g (58 mmol) of 3-(4-chloropyrid-2-yl)-3-oxopropionic acid ethyl ester are dissolved in 400 ml of ethanol, and 9.10 g (58 mmol) of 2-amidinopyridine hydrochloride are added. After the addition of 14.44 ml of 4N sodium hydroxide solution, refluxing is carried out for 7 hours. The mixture is cooled and concentrated to a fifth of its original volume. The crude product is filtered off and recrystallised from methanol, yielding 6-(4-chloropyrid-2-yl)-2-pyrid-2-yl-pyrimidin-4-ol in the form of beige needles.

Quelle