Diethyl Malonate → Ethyl 2-(6-(3-chlorophenylamino)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)acetate

Participants

Reaction Steps

(Step 5-i) N-(3-chlorophenyl)-6-hydrazinylpyridazin-3-amine (1 g, 4.25 mmol)) was taken up in ethanol (10 mL) and diethyl malonate (2 g, 12.76 mmol) was added. After microirradiation at 150° C. for 30 min, the reaction mixture was concentrated to dryness, taken up in ethyl acetate, and filtered to give the product, ethyl 2-(6-(3-chlorophenylamino)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)acetate, as a solid (1.1 g, 3.3 mmol, 78% yield).

Provenance & Evidence