[Na].[C:2]([CH2:4][C:5]([O:7][CH3:8])=[O:6])#[N:3].[CH2:9]([N:16]=[N+:17]=[N-:18])[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.[CH2:19](O)C>>[NH2:3][C:2]1[N:16]([CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[N:17]=[N:18][C:4]=1[C:5]([O:7][CH2:8][CH3:19])=[O:6]To a solution of 1.15 g (0.05 mol) of sodium in 80 mL of absolute ethanol was added 4.5 mL of methyl cyanoacetate and 6.5 g (0.05 mol) of benzyl azide. A white precipitate formed immediately, and the resulting mixture was stirred overnight. The yellowish creamy mixture was poured into 500 mL of ice water, and a crude yellow precipitate was collected by filtration. Recrystallization from ethanol afforded the title compound as a pale yellow solid (5.0 g, 42%). m.p. 153° C.
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