Triethylamine → 5-[4-(3-chloro-phenylethynyl)-2-methyl-imidazol-1-yl]-2-methyl-2H-pyridazin-3-one

関与物質

反応手順

A solution of 8 mg bis(triphenyl-phosphine)palladium dichloride in 3 ml of DMF was degassed with argon. Then 52 mg (0.165 mmol) 5-(4-iodo-2-methyl-imidazol-1-yl)-2-methyl-2H-pyridazin-3-one, 1 mg (0.03 mmol) of triphenylphosphine, 0.046 ml (0.33 mmol) triethylamine were added and the mixture was stirred for 5 min at room temperature. Then 1 mg (0.005 mmol) of copper(I) iodide and 0.042 ml (0.33 mmol) of 1-chloro-3-ethynyl-benzene were added and the mixture was stirred for 2 h at 50° C. The mixture was evaporated to dryness in vaccuo, taken up in 5 ml of ethyl acetate. Then ca. 1 g of silicagel was added and the suspension was evaporated to dryness. The silicagel containing adsorbed product was loaded onto a 20 g flash chromatography column. The product was eluted with ethyl acetate. The pure fractions were concentrated to yield 36 mg (0.111 mmol, 67%) of the title compound as a light yellow crystalline solid, MS: m/e=325.2, 327.2 (M+H+).

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