[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([C:12]#[N:13])[C:6]([C:14]#[N:15])=[CH:5]2.C[O-].[Na+].[Na].[NH3:20]>CO>[Br:1][C:2]1[CH:11]=[CH:10][C:9]2=[CH:8][C:7]3[C:12](=[NH:13])[NH:15][C:14](=[NH:20])[C:6]=3[CH:5]=[C:4]2[CH:3]=1Under nitrogen, 44.1 g (0.17 mol) of 6-bromo-2,3-dicyanonaphthalene was added to a solution of sodium methoxide in methanol prepared by adding 1.92 g (84 mmols) of metallic sodium to 270 ml of absolute methanol in 5 times, and anhydrous ammonia gas was slowly bubbled into the resulting mixture with sufficient stirring at room temperature for about 1 hour. The mixture was refluxed for about 3 hours while bubbling therethrough anhydrous ammonia gas. After cooling, the yellow solid precipitated was filtered and the residue was sufficiently washed with methanol and dried under reduced pressure to obtain 45 g of 6-bromo-1,3-diiminobenz[f]isoindoline as a yellow solid. IR spectrum of this 6-bromo-1,3-diiminobenz[f]isoindoline is shown in FIG. 4. The 6-bromo-1,3-diiminobenz[f]isoindoline was used in the subsequent reaction without further purification.
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