[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[N:14]3[C:9]([CH2:10][CH2:11][CH2:12][CH2:13]3)=[C:8]([CH2:15][CH2:16][N+:17]([O-])=O)[C:7]=2[N:20]=1>[Ni].CO>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[N:14]3[C:9]([CH2:10][CH2:11][CH2:12][CH2:13]3)=[C:8]([CH2:15][CH2:16][NH2:17])[C:7]=2[N:20]=1Under a hydrogen pressure of 55 psi, 420 mg (1.53 mmol) of the compound obtained in Step E and 170 mg of Raney nickel are stirred in 20 ml of methanol at 60° C. for 15 hours. After returning to room temperature, the reaction mixture is filtered using a Büchner funnel and then evaporated to yield the title product in the form of a brown oil.
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