4-Quinolinecarboxaldehyde → N-[3-(2-fluoro-4'-{[(quinolin-4-ylmethyl)-amino]-methyl}-biphenyl-4-yl)-2-oxo-oxazolidin-5-ylmethyl]-acetamide

Participants

Reaction Conditions

Reaction Steps

A solution of amine 54 (36 mg, 0.1 mmol) in a mixture of THF and DMF (3:1, v/v) was treated with quinoline-4-carboxaldehyde (16 mg, 0.1 mmol, 1.0 equiv) at 25° C. under argon, and the resulting reaction mixture was stirred at 25° C. for 30 min before being treated with sodium triacetoxyborohydride (NaB(OAc)3H, 33 mg, 0.15 mmol, 1.5 equiv) at 25° C. The reaction mixture was subsequently stirred at 25° C. for 6 h. When TLC and HPLC showed the reductive amination reaction was complete, the reaction mixture was concentrated in vacuo. The residue was then directly purified by flash column chromatography (0-7% MeOH—CH2Cl2 gradient elution) to produce the desired N-[3-(2-fluoro-4′-{[(quinolin-4-ylmethyl)-amino]-methyl}-biphenyl-4-yl)-2-oxo-oxazolidin-5-ylmethyl]-acetamide 4016 (32.9 mg, 66% yield) as pale-yellow oil, which solidified upon standing at room temperature in vacuo. 1H NMR (300 MHz, DMSO-d6) δ 1.85 (s, 3H, COCH3), 3.44 (t, 2H, J=5.4 Hz), 3.79 (dd, 1H, J=6.4, 9.2 Hz), 3.88 (s, 2H), 4.17 (t, 1H, J=9.1 Hz), 4.30 (s, 2H), 4.77 (m, 1H), 7.41 (dd, 1H, J=2.0, 8.0 Hz), 7.51-7.63 (m, 8H, aromatic-H), 7.74 (t, 1H, J=8.0 Hz), 8.04 (d, 1H, J=8.0 Hz), 8.18 (d, 1H, J=8.0 Hz), 8.27 (t, 1H, J=5.8 Hz, NHCOCH3), 8.87 (d, 1H, J=8.0 Hz). LCMS (ESI) m/e 499 (M+H)+.

Provenance & Evidence