p-Toluenesulfonic acid → HCID 18315617, compound

Participants

Reaction Steps

Heat a mixture of 2-methyl-4-chloro-8-(3,4-dichlorophenyl)pyrido[2,3-d]pyridazine (4) (2.0 g, 6.2 mmol) and p-toluenesulfonic acid (3.2 g) in 10 mL of di-n-propylamine in a sealed tube at 180° C. for 48 hours. Cool the reaction mixture to ambient temperature and partition the reaction mixture between ethyl acetate and water. Wash the organic layer with water and dry over MgSO4. Evaporate the dried solution and purify the product 5 by flash chromatography.

Provenance & Evidence