[N+:1]([O-:4])(O)=[O:2].S(=O)(=O)(O)O.O.[C:11]1([C:17]23[CH2:25][CH:21]4[CH2:22][CH:23]([CH2:24]2)[C:19]([C:26](=[O:28])[CH3:27])([CH2:20]4)[CH2:18]3)[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1>[N+](C)([O-])=O>[N+:1]([C:14]1[CH:15]=[CH:16][C:11]([C:17]23[CH2:25][CH:21]4[CH2:22][CH:23]([CH2:24]2)[C:19]([C:26](=[O:28])[CH3:27])([CH2:20]4)[CH2:18]3)=[CH:12][CH:13]=1)([O-:4])=[O:2]Nitration mixture (1 mL) [the nitration mixture was prepared by mixing of 10.5 g of nitric acid (d 1.375 at 22° C.), 180.0 g of conc. sulphuric acid (d 1.84 at 22° C.), and 16 g of H2O) was added drop wise to a stirred solution of 1-(1-phenyltricyclo[3.3.1.03,7]non-3-yl)ethanone (240 mg, 1.0 mmol) obtained in preparation 1, in nitromethane (4 mL) at 0° C. After stirring for 2 h, the reaction mixture was poured into ice cold water and extracted with EtOAc, the combined organic layers were washed with brine and dried over Na2SO4. The solvent was evaporated under reduced pressure and the crude product was purified by column chromatography to obtain 1-[1-(4-nitrophenyl)tricyclo[3.3.1.03,7]non-3-yl]ethanone as an off-white solid (250 mg) in 88% yield. M.R: 61.3-66.6° C. m/z (M+1) 286; IR cm−1 2953, 1697, 1598, 1519, 1217, 1110, 852, 768. 1H NMR (CDCl3) 300 MHz δ 8.17 (d, J=8.7 Hz, 2H), 7.43 (d, J=8.7 Hz, 2H), 2.87-2.80 (m, 1H), 2.61-2.55 (m, 1H), 2.34-2.26 (m, 1H), 2.23 (s, 3H), 2.13-1.98 (m, 4H), 1.90-1.71 (m, 5H).
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