[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:13]([O:14][CH2:15][CH:16]3[CH2:18][CH2:17]3)=[CH:12][CH:11]=[CH:10][N+:9]=2[O-])=[CH:4][CH:3]=1.[CH2:20]([N:22](CC)CC)C.CN(C)C(Cl)=O.C[Si](C#N)(C)C>C(#N)C>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:9]=[C:10]([C:20]#[N:22])[CH:11]=[CH:12][C:13]=2[O:14][CH2:15][CH:16]2[CH2:18][CH2:17]2)=[CH:4][CH:3]=1To a solution of 25 g 2-(4-chloro-phenyl)-3-cyclopropylmethoxy-pyridine 1-oxide in 500 mL acetonitrile, 9.23 g triethylamine and 10.73 g dimethylcarbamoylchlorid were added. After 5 minutes at room temperature, 27.88 g trimethylsilylcyanid was added. The reaction mixture was stirred at 90° C. over 15 h. The reaction mixture was partitioned between water and ethyl acetate; then extracted. The organic phase was washed with brine; then dried over MgSO4 and purified by chromatography on silica gel with a gradient of heptane to heptane:ethyl acetate 2:1 to yield 15.30 g (59.26%) of the title compound as light yellow solid, MS 285.1 (M+H)+.
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