1-(2-Hydroxyethyl)piperazine → 2-{4-[2-(4-Fluorophenyl)-3-(2-methoxypyrid-4-yl)imidazo[1,2-b]pyridazin-6-yl]piperazin-1-yl}ethanol

Participants

Reaction Conditions

Reaction Steps

A mixture of 0.25 g (0.70 mmol) of 6-chloro-2-(4-fluorophenyl)-3-(2-methoxypyrid-4-yl)imidazo-[1,2-b]pyridazine and 0.37 g (2.8 mmol) of 2-(piperazin-1-yl)ethanol in 6 mL of pentanol is stirred at 135° C. for 18 hours. The solvent is then evaporated off under reduced pressure and the oily residue is chromatographed on a column of silica gel, eluting with a stepwise gradient of methanol and aqueous ammonia in dichloromethane (0/0/100 to 2/1/98). 0.136 g of product is isolated after trituration in diisopropyl ether, filtering off and drying under reduced pressure.

Provenance & Evidence