Reaction Steps
To 5-(1-octynyl)-6-chloro-3-(1-BOC-2-(R)-pyrrolidinylmethoxy)pyridine from Example 79a (330 mg, 0.78 mmol) was added formalin (37%, 9 mL) and formic acid (4.5 mL), and the mixture was heated at 70° C. for 2 hours. The solvent was concentrated, and solid NaHCO3 was added to the residue. At pH 8 the mixture was extracted with CH2Cl2, which was dried over MgSO4 and concentrated. The residue was chromatographed on a silica gel column, eluting with CH2Cl2:MeOH 100:1-100:3 to afford to give the free base of the title compound (166.5 mg, 64% yield). MS (CI/NH3) m/z 335 (M+H)+. 1H NMR (CDCl3, 300 MHz) δ 0.92 (m, 3H), 1.32 (m, 4H), 1.48 (m, 2H), 1.62 (m, 2H), 1.80 (m, 4H), 2.02 (m, 1H), 2.30 (m, 1H), 2.45 (m, 1H), 2.47 (s, 3H), 2.66 (m, 1H), 3.12 (m, 1H), 3.93 (m, 2H), 7.27 (m, 1H), 7.98 (m, 1H). The base was converted to the salt by treatment with HCl in Et2O to give the title compound. mp 114-116° C. (dec). MS (CI/NH3) m/z 335 (M+H)+. 1H NMR (D2O, 300 MHz) δ: 1.02 (t, J=6.7 Hz, 3H), 1.43 (m, 4H), 1.58 (m, 2H), 1.71 (m, 2H), 2.06 (m, 1H), 2.21 (m, 2H), 2.42 (m, 1H), 2.56 (t, J=6.7 Hz, 2H), 3.06 (s, 3H), 3.28 (m, 1H), 3.77 (m, 1H), 3.87 (m, 1H), 4.41 (m, 2H), 7.50 (m, 1H), 8.12 (d, J=2.4 Hz, 1H). Anal. Calcd for C19H27N2OCl.1.5 HCl: C, 58.58; H, 7.37; N, 7.19. Found: C, 58.64; H, 7.39; N, 7.20. [α]25D=+8.99° (c 0.64, MeOH).
