[C:1]([C:3]1[CH:8]=[CH:7][C:6]([Br:9])=[CH:5][N:4]=1)#[N:2].[N-:10]=[N+:11]=[N-:12].[Na+].[Cl-].[NH4+].O>CN(C)C=O>[NH:10]1[C:1]([C:3]2[CH:8]=[CH:7][C:6]([Br:9])=[CH:5][N:4]=2)=[N:2][N:12]=[N:11]110 g of 2-cyano-5-bromopyridine prepared in the Preparation example 5 was dissolved in 100 ml of dimethylformamide, 5.33 g of sodiumazide, and 4.4 g of ammonium chloride were added to the solution at room temperature, and the solution was stirred at the temperature of 110° C. for 3 hours for reaction. The reaction mixture was added with water and then was extracted with ethyl acetate. The organic layer, thus separated, was washed with brine, dehydrated, filtrated and concentrated in vacuo thereby to obtain 10.5 g of the title compound. Yield 85%.
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