Reaktion #740589

Reaktionsgleichung

4-chlorothieno[3,2-c]pyridine

piperazine

→

golden oil

Ausbeute 56.1%

4-(1-Piperazinyl)thieno[3,2-c]pyridine

Ausbeute 56.1%

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction was cooled
2. 2
   Sonstigepartitioned between dichloromethane and water
3. 3
   Sonstigethe organic layer was isolated
4. 4
   Trocknendried (MgSO4)
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated in vacuo to an oil

Vorschrift

A mixture of 4-chlorothieno[3,2-c]pyridine (22.7 g, 0.13 mole) and piperazine (57.7 g, 0.67 mole) were heated in a bomb with a minimum amount of ethanol (50 mL) at 120° for 24 hours. The reaction was cooled, partitioned between dichloromethane and water, and the organic layer was isolated, dried (MgSO4), filtered, and concentrated in vacuo to an oil. Flash chromatography (methylene chloride-10% methanol-1% ammonium hydroxide) of this material gave 16 g (54%) of a golden oil. Treatment of an ethanol solution of the oil with ethanolic HCl followed by recrystallization from ethanol gave the hydrochloride salt as off-white crystals, m.p. 275°-283°.

Quelle