Reaction Steps
To N2-methyl-N1-{(3aS,4S,6aR)-2-[3-(trifluoromethyl)benzyl]octahydrocyclopenta[c]pyrrol-4-yl}-L-leucinamide from Example 164 (122 mg, 0.296 mmol) in dichloromethane (0.5 mL) was added N,N-diisopropylethylamine (78 μL, 0.445 mmol) followed by methanesulfonyl chloride (25.4 μL, 0.326 mmol), and the reaction mixture was stirred at room temperature overnight. The reaction was reduced in volume and loaded onto a silica gel cartridge (Analogix®, Burlington, Wis., RS-12). The title compound was eluted with a gradient of 0% to 5% methanol (2 N ammonia)/dichloromethane over 20 minutes: 1H NMR (500 MHz, pyridine-d5) δ ppm 8.59 (d, J=6.7, 1H), 7.73 (s, 1H), 7.66 (d, J=7.6, 1H), 7.62 (d, J=7.8, 1H), 7.51 (t, J=7.7, 1H), 4.78 (dd, J=6.2, 9.5, 1H), 4.41-4.33 (m, 1H), 3.67 (d, J=13.3, 1H), 3.16 (s, 3H), 3.15 (s, 3H), 2.90 (qd, J=3.3, 7.9, 1H), 2.75 (dd, J=3.3, 9.6, 1H), 2.53-2.44 (m, 1H), 2.38-2.29 (m, 3H), 1.89-1.70 (m, 4H), 1.70-1.58 (m, 3H), 1.36-1.26 (m, 1H), 0.83 (d, J=6.6, 3H), 0.81 (d, J=6.5, 3H); MS (ESI+) m/z 490 (M+H)+.
