[N+:1]([C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[C:9]1([CH2:16][CH2:15][CH2:14][CH2:13]1)[CH2:8][C:7]2=[O:17])([O-])=O>CO.[Ni].Cl>[NH2:1][C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[C:9]1([CH2:16][CH2:15][CH2:14][CH2:13]1)[CH2:8][C:7]2=[O:17]A solution of 5'-nitro-spiro(cyclopentane-1,1'-indan)-3'-one (23.1 g; 0.1 mole) in methanol (250 ml) is hydrogenated in a shaking autoclave at about 4 atg with a Raney-nickel catalyst at 40°-60° C. The mixture is chilled, the catalyst filtered off and washed with methanol, after which the filtrate is evaporated to dryness. A light yellow powder is obtained (19.5 g; yield 97%). Said powder is dissolved in 2 N hydrochloric acid and extracted with ether, and then the aqueous phase is neutralized with 2 N sodium hydroxid solution. The precipitate is filtered off, washed with water and dried, and 18.8 g of a yellow-white crystal powder is obtained. A sample is recrystallized twice from benzene and then melts at 125° C.
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