Réaction #602753

Équation de réaction

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

Rendement 58.4%

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

Rendement 58.4%

Solvants

toluene

chloroform

dichloromethane

Conditions de réaction

Traitement

1. 1
   LavageThe solution is washed with 2 ml of a 2N aqueous solution of sodium hydroxide
2. 2
   SéchageThe organic phase is dried over sodium sulfate
3. 3
   Concentrationconcentrated under reduced pressure
4. 4
   workup.ADDITIONafter the addition of silica gel
5. 5
   Autrethe 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

Mode opératoire

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.

Source