Cl[C:2]1[C:3]2[C:10]3([CH2:18][C:17]4[C:12](=[CH:13][CH:14]=[C:15]([N+:19]([O-])=O)[CH:16]=4)[CH2:11]3)[C:9](=[O:22])[NH:8][C:4]=2[N:5]=[CH:6][N:7]=1.C(N(CC)CC)C.[H][H]>CCOC(C)=O.CO.[Pd]>[NH2:19][C:15]1[CH:16]=[C:17]2[C:12](=[CH:13][CH:14]=1)[CH2:11][C:10]1([C:3]3[CH:2]=[N:7][CH:6]=[N:5][C:4]=3[NH:8][C:9]1=[O:22])[CH2:18]2
To a solution of (±)-4′-chloro-5-nitro-1,3-dihydrospiro[indene-2,5′-pyrrolo[2,3-d]pyrimidin]-6′(7′H)-one from Step C (400 mg, 1.26 mmol) in EtOAc (40 mL) and MeOH (10 mL) was added triethylamine (0.88 mL, 6.315 mmol). The mixture was hydrogenated at 50 psi hydrogen over 10% Pd/C (100 mg). After 24 h and 90 h, an additional amount of palladium on carbon (100 mg) was added to the reaction mixture and hydrogenation was continued for a total of 180 h. The reaction mixture was filtered through a pad of Celite and concentrated in vacuo. The residue was purified by HPLC using a reversed phase C18 column and eluting with a gradient of H2O:CH3CN:CF3CO2H—90:10:0.1 to 5:95:0.1. Lyophilization provided the title compound. MS: m/z=253 (M+1).
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