Reaction Steps
(S)-4-Methyl-2-morpholinopentanoic acid hydrochloride (363 mg, 1.526 mmol) and triethylamine (0.387 mL, 2.77 mmol) were combined in dichloromethane (10 mL). 1-Hydroxybenzotriazole hydrate (234 mg, 1.526 mmol) and N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine (0.270 mL, 1.526 mmol) were added, and the reaction was stirred for 15 minutes. Then (3aS,4R,6aR)-2-benzyloctahydrocyclopenta[c]pyrrol-4-amine (300 mg, 1.387 mmol) from Example 16 Step E was added, and the reaction mixture was stirred at ambient temperature for 24 hours. The reaction was quenched with aqueous sodium bicarbonate and extracted with dichloromethane. The solvent was removed in vacuo and the crude material was purified by silica gel chromatography using 1-10% methanol (2 N ammonia)/dichloromethane to give the title compound: 1H NMR (500 MHz, pyridine-d5) δ ppm 8.27 (d, J=7.3, 1H), 7.44 (d, J=7.4, 2H), 7.37 (t, J=7.5, 2H), 7.27 (dd, J=9.8, 17.3, 1H), 4.51-4.39 (m, 1H), 3.74 (t, J=4.5, 4H), 3.62 (d, J=13.1, 1H), 3.45 (d, J=13.1, 1H), 3.29-3.21 (m, 1H), 2.87 (dd, J=2.4, 9.0, 1H), 2.79 (dt, J=4.5, 9.3, 2H), 2.75-2.68 (m, 2H), 2.55 (d, J=14.8, 2H), 2.49-2.43 (m, 1H), 2.35 (dd, J=2.6, 8.9, 1H), 2.32-2.26 (m, 1H), 2.11 (dq, J=6.1, 12.1, 1H), 1.86 (dd, J=6.6, 12.2, 3H), 1.67-1.55 (m, 2H), 1.41 (dt, J=6.2, 20.1, 1H), 0.94 (dd, J=6.2, 11.1, 6H); MS (HI+) m/z 400 (M+H)+.
