Cl[C:2]1[C:7]([O:8][CH2:9][CH2:10][O:11]C2CCCCO2)=[CH:6][CH:5]=[CH:4][N:3]=1.[NH:18]1[CH2:23][CH2:22][CH2:21][CH:20]([CH2:24][OH:25])[CH2:19]1.CC(C)([O-])C.[K+].C(O)(C)(C)C>C1(C)C=CC=CC=1>[NH:18]1[CH2:23][CH2:22][CH2:21][CH:20]([CH2:24][O:25][C:2]2[C:7]([O:8][CH2:9][CH2:10][OH:11])=[CH:6][CH:5]=[CH:4][N:3]=2)[CH2:19]1A solution of 2-chloro-3-[2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]pyridine (from Example 4; 100 mg, 0.39 mmol), 3-piperidinemethanol (65 μl, 0.58 mmol) and 1.0 M potassium tert-butoxide in tert-butanol (0.8 mL, 0.80 mmol) in 4 mL of toluene was heated at 100° C. for 1 day. The organic phase was washed with 3×2 mL of water and 2 mL of brine. The organic phase was shaken at 50° C. with 4 mL of 2.0 M acetic acid for 2 days. The aqueous phase was washed with 3×3 mL of ethyl acetate, made basic by addition of potassium hydroxide, saturated with sodium chloride and extracted with 3×2 mL of ethyl acetate. The organic phase was dried (MgSO4) and concentrated under reduced pressure to give 52 mg (0.21 mmol, 53%) of the title compound as a colorless oil. LC-UV purity 95%. MS m/z 253 (M+1)+, calc. 253 (M+1)+.
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