6-Amino-3-chloropyridazine → 3-Amino-6-(2-ethylsulfanylphenyl)pyridazine

Participants

Reaction Conditions

Reaction Steps

A mixture of 700 mg of 3-amino-6-chloropyridazine, 1.42 g of 2-ethylsulfanylphenylboronic acid pinacol ester, 148 mg of tris(dibenzylideneacetone)dipalladium(0), 603 mg of tricyclohexylphosphine (18% toluene solution), 3.43 g of tripotassium phosphate, 4.5 ml of 1,4-dioxane and 1.5 ml of water was stirred at 100° C. for 3 hours. Water was added to the cooled reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with water, then dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The resulting residue was applied to a silica gel column chromatography to obtain 927 mg of 3-amino-6-(2-ethylsulfanylphenyl)pyridazine.

Provenance & Evidence