O[CH:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([O:13][C:14]([F:17])([F:16])[F:15])=[CH:9][CH:8]=2)[C:5](=[O:18])[CH:4]2[CH2:19][C:20](=[CH2:22])[CH2:21][CH:3]12.[BH3-]C#N.[Na+].O>FC(F)(F)C(O)=O>[CH2:22]=[C:20]1[CH2:19][CH:4]2[C:5](=[O:18])[N:6]([C:7]3[CH:8]=[CH:9][C:10]([O:13][C:14]([F:16])([F:15])[F:17])=[CH:11][CH:12]=3)[CH2:2][CH:3]2[CH2:21]1To a solution of 3-Hydroxy-5-methylene-2-(4-trifluoromethoxy-phenyl)-hexahydro-cyclopenta[c]pyrrol-1-one (0.1 g, 0.32 mmol) in trifluoroacetic acid (20 mL) was added NaCNBH3 (0.04 g, 0.64 mmol) at −20° C., and the mixture was stirred for 1 h. Water (30 mL) was added. The mixture was extracted with dichloromethane (3×20 mL), washed with brine (50 mL), and dried over anhydrous Na2SO4. The solvent was removed by reduced pressure. The residue was purified by column chromatography on silica gel with petroleum ether/ethyl acetate (10:1 to 5:1) to yield the title compound (40 mg, 40%). 1H NMR (300 MHz, CDCl3): δ 7.69-7.64 (m, 2H), 7.25-7.19 (m, 2H), 4.91 (s, 2H), 4.07-4.01 (m, 1H), 3.54-3.49 (m, 1H), 3.19-3.12 (m, 1H), 2.96-2.71 (m, 4H), 2.25-2.18 (m, 1H); LC-MS: [M+1]+ 298.1.
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