[N-:1]=[N+:2]=[N-:3].[Na+].Br[CH2:6][C:7]1[CH:22]=[CH:21][C:10]([CH2:11][C:12]2[CH:17]=[CH:16][C:15]([N+:18]([O-:20])=[O:19])=[CH:14][CH:13]=2)=[CH:9][CH:8]=1.O>CN(C)C=O>[N:1]([CH2:6][C:7]1[CH:8]=[CH:9][C:10]([CH2:11][C:12]2[CH:17]=[CH:16][C:15]([N+:18]([O-:20])=[O:19])=[CH:14][CH:13]=2)=[CH:21][CH:22]=1)=[N+:2]=[N-:3]Sodium azide (210 mg, 1.15 eq) was added to a solution of 4-(4-bromomethylbenzyl)-nitrobenzene (901 mg) in N,N-dimethylformamide (10 mL). The reaction mixture was stirred at room temperature for 2 hours, poured into water, and extracted with diethyl ether (3×). The organic phase was washed with water (3×), dried (MgSO4), and evaporated to dryness. Chromatography on silica gel, eluting with hexane/ethyl acetate, gave 4-(4-azidomethylbenzyl)-nitrobenzene (492 mg, 62%) as a yellow oil.
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