I[C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:13]=[CH:12][C:11]([I:14])=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.[Hg](C#N)[C:16]#[N:17].N1C=CC=CC=1.Cl>CN(C)C=O>[I:14][C:11]1[CH:12]=[CH:13][C:8]([C:5]2[CH:6]=[CH:7][C:2]([C:16]#[N:17])=[CH:3][CH:4]=2)=[CH:9][CH:10]=1A mixture of 15 g (33.2.10-3 mol) of 4,4'-diiodo-1,1'-biphenyl, 3.13 g (34.9.10-3 mol) of mercuric cyanide and 2.75 g (34.9.10-3 mol) of pyridine is heated at 200° C. for 15 minutes and 6 ml of dimethylformamide are then added to the mixture. After cooling, the reaction medium is hydrolyzed with a 1N aqueous solution of hydrochloric acid. The expected product is extracted with ethyl acetate. The organic phase obtained is washed with water until the pH of the washings is neutral, dried over magnesium sulfate and evaporated under vacuum. 3.28 g (yield: 33%) of a yellow solid are obtained after purification by flash chromatography using a chloroform/toluene mixture (1/1 v/v) as the eluent.
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