CC1C=C2C(N=CC=C2)=C2C=1C=CC=N2.C([O-])([O-])=O.[Cs+].[Cs+].I[C:23]1[CH:24]=[C:25]([CH:28]=[CH:29][CH:30]=1)[C:26]#[N:27].[CH2:31]([OH:35])[CH2:32][CH2:33][CH3:34]>[Cu]I.C1(C)C=CC=CC=1>[CH2:31]([O:35][C:23]1[CH:24]=[C:25]([CH:28]=[CH:29][CH:30]=1)[C:26]#[N:27])[CH2:32][CH2:33][CH3:34]
A test tube was charged with CuI (20 mg, 0.10 mmol, 10 mol %), 5-methyl-1,10-phenanthroline (39 mg, 0.20 mmol, 20 mol %), Cs2CO3 (652 mg, 2.0 mmol), 3-iodobenzonitrile (229 mg, 1.0 mmol), n-butanol (366 μL, 4.0 mmol) and toluene (1 mL). The test tube was sealed and the reaction mixture was stirred at 110° C. for 28 h. The resulting suspension was cooled to room temperature and filtered through a 0.5×1 cm pad of silica gel eluting with ethyl acetate. The filtrate was concentrated. Purification of the residue by flash chromatography on silica gel (2×20 cm; hexane/ethyl acetate 30:1) provided 152 mg (87% yield) of the title compound as a colorless oil.
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