A solution of (R)-(1-(4-fluorophenyl)-4,4a,5,6,7,8-hexahydro-1H-pyrazolo[3,4-g]isoquinolin-4a-yl)(pyridin-2-yl)methanone in dichloromethane (2.5 mL) (2.7 mL, ˜0.2 mmol) containing diisopropylamine (174 μL, 1 mmol) was added to 6-chloro-pyridine-3-sulfonyl chloride (53 mg, 0.25 mmol) and diisopropylethylamine (100 μL, 0.57 mmol) and the mixture stirred for 16 hours. The reaction mixture was concentrated and the residue was purified by column chromatography on silica gel (gradient: 20-30% ethyl acetate in cyclohexane) to afford (R)-(6-((6-chloropyridin-3-yl)sulfonyl)-1-(4-fluorophenyl)-4,4a,5,6,7,8-hexahydro-1H-pyrazolo[3,4-g]isoquinolin-4a-yl)(pyridin-2-yl)methanone as a white solid (85 mg). LCMS (Method B ESI): RT 3.92 min, m+H=550.0; 1H NMR (400 MHz, CDCl3): δ 8.66 (d, J=2.5 Hz, 1 H); 8.61 (d, J=4.7 Hz, 1 H); 7.85-7.86 (m, 3 H); 7.48-7.49 (m, 1 H); 7.42-7.43 (m, 2 H); 7.35 (d, J=8.4 Hz, 1 H); 7.27 (s, 1 H); 7.15-7.16 (m, 2 H); 6.50 (s, 1 H); 5.57 (d, J=12.4 Hz, 1 H); 4.23 (d, J=16.9 Hz, 1 H); 3.85-3.95 (m, 1H); 2.86-2.87 (m, 3 H); 2.66 (d, J=11.9 Hz, 1 H); 2.53 (d, J=15.1 Hz, 1 H).
