Diisopropylethylamine → 2-(4-Chlorophenyl)-5-(1H-imidazol-1-yl)-4-[4-(4-pyridinyl)phenoxy]-3(2H)-pyridazinone

Participants

Reaction Steps

1.5 mmol of 4-(4-bromophenyl)oxy-2-(4-chlorophenyl)-5-(1H-imidazol-1-yl)-3(2H)-pyridazinone, 2.1 mmol of 4-trimethylstannylpyridine, 0.1 mmol of bis(triphenyl-phosphine)palladium dichloride and 1.3 mmol of ethyldiisopropylamine in 5 ml of dimethylformamide are heated at 100° C. for 5 hours. The solvent is removed in a rotary evaporator, and the residue is purified by chromatography on silica gel (elution with ethyl, acetate/methanol mixtures). 0.3 g (45% of theory) is obtained of m.p. 188° C.

Provenance & Evidence