Reaktion #602753

Reaktionsgleichung

ortho-chloranil

ethyl 4-[2-bromo-6-(4-pyrrolidin-1-ylpiperidin-1-yl)imidazo[1,2-b]pyridazin-3-yl]-4H-pyridazine-1-carboxylate

→

product

Ausbeute 58.4%

2-bromo-3-pyridazin-4-yl-6-(4-pyrrolidin-1-ylpiperidin-1-yl)imidazo[1,2-b]pyridazine

Ausbeute 58.4%

Lösungsmittel

toluene

chloroform

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   WaschenThe solution is washed with 2 ml of a 2N aqueous solution of sodium hydroxide
2. 2
   TrocknenThe organic phase is dried over sodium sulfate
3. 3
   Einengenconcentrated under reduced pressure
4. 4
   workup.ADDITIONafter the addition of silica gel
5. 5
   Sonstigethe product is purified by chromatography on a silica gel column, elution
6. 6
   workup.ADDITIONbeing carried out with a mixture of 0 to 10% of methanol in dichloromethane

Vorschrift

0.101 g of ortho-chloranil (0.41 mmol) in solution in 1 ml of toluene is added to a mixture of 0.16 g (0.32 mmol) of ethyl 4-[2-bromo-6-(4-pyrrolidin-1-ylpiperidin-1-yl)imidazo[1,2-b]pyridazin-3-yl]-4H-pyridazine-1-carboxylate in 4 ml of chloroform. The mixture is stirred at ambient temperature for 1 hour and then diluted with 40 ml of dichloromethane. The solution is washed with 2 ml of a 2N aqueous solution of sodium hydroxide and then with a saturated solution of sodium chloride. The organic phase is dried over sodium sulfate and then concentrated under reduced pressure after the addition of silica gel. The evaporation residue is loaded onto a silica gel column and the product is purified by chromatography on a silica gel column, elution being carried out with a mixture of 0 to 10% of methanol in dichloromethane. 0.080 g of product is thus isolated.

Quelle