P-Phenylenediamine → N1-(6-chloroimidazo[1,2-b]pyridazin-8-yl)benzene-1,4-diamine

Participants

Reaction Conditions

Reaction Steps

p-Aminoaniline (0.48 g, 4.4 mmol) and triethylamine (1.3 ml, 9.2 mmol) were added to 8-bromo-6-chloroimidazo[1,2-b]pyridazine HCl (1.0 g, 4.2 mmol) from Example I(1), step 1b in EtOH (20 mL). The mixture was heated to 90° C. and stirred for 1 hr. The solution was then concentrated in vacuo to give crude N1-(6-chloroimidazo[1,2-b]pyridazin-8-yl)benzene-1,4-diamine. Cold ethanol was then added and the crude solid rinsed 3×. Following filtration, collected 0.45 g of the desired material.

Provenance & Evidence