Reaction Steps
To a solution of (4-{[(3,5-Dimethyl-pyridin-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amino]-methyl}-3-hydroxymethyl-benzylamino)-acetic acid methyl ester (0.128 g, 0.26 mmol) in THF was added LiAlH4 (0.049 g, 1.30 mmol). The resulting slurry rapidly bubbled for the first minute and then gas production subsided. The mixture was stirred at room temperature for one hour and then was quenched with saturated aqueous NH4Cl (20 mL) and extracted with 98:2 (CHCl3/MeOH) (5×40 mL). The combined organic extracts were dried (Na2SO4), filtered and concentrated under reduced pressure to a pale yellow oil. Purification by column chromatography on silica gel (CH2Cl2:MeOH:NH4OH, 85:10:5, v/v/v) afforded 2-(4-{[(3,5-dimethyl-pyridin-2-ylmethyl)-(5,6,7,8-tetrahydro-quinolin-8-yl)-amino]-methyl}-3-hydroxymethyl-benzylamino)-ethanol (0.045 g, 37%) as a colorless oil. 1H NMR (CDCl3) δ 1.58 (m, 1H), 1.98 (m, 2H), 2.16 (m, 1H), 2.21 (s, 3H), 2.25 (s, 3H), 2.64 (m, 1H), 2.78 (m+t, 3H), 3.61 (t, 2H, J=4.5 Hz), 3.65-3.72 (m, 3H), 3.75 (s, 2H), 3.88 (t, 1H, J=9.0 Hz), 4.15 (d, 2H, J=12.0 Hz), 4.36 (d, 1H, J=9.0 Hz), 7.01 (dd, 1H, J=7.5, 3.0 Hz), 7.16 (d, 1H, J=6.0), 7.21-7.32 (m, 4H), 8.16 (s, 1H), 8.36 (d, 1H, J=3.0 Hz). 13C NMR (CDCl3) δ 9.2, 26.5, 28.7, 28.8, 29.6, 42.9, 44.1, 79.7, 84.4, 86.5, 115.5, 121.8, 123.5, 124.6, 124.9, 130.8, 137.4, 140.1, 145.5, 155.1. HPLC: 99%. ES-MS m/z 461 [M+H]+.
