Tetrahydrofuran → (R)-5-((1H-1,2,3-Triazol-1-yl)methyl)-3-(3-fluoro-4-iodophenyl)oxazolidin-2-one

Participants

Reaction Steps

A solution of the crude (5R)-3-(3-fluoro-4-iodo-phenyl)-5-(4-trimethylsilanyl-[1,2,3]triazol-1-ylmethyl)-oxazolidin-2-one (1024, 14.72 g, 32.0 mmol) in an 1 M solution of tetrabutylammonium fluoride in THF (TBAF, 128 mL, 128 mmol, 4.0 equiv) was treated with acetic acid (HOAc, 5 mL) at room temperature, and the resulting reaction mixture was stirred at room temperature for 24 h. When TLC and HPLC/MS showed that the reaction was complete, the solvents were removed in vacuo. The residue was treated with H2O (300 mL) at room temperature and the resulting mixture was stirred at room temperature for 1 h. The solids were collected by filtration, washed with H2O (2×100 mL) and 20% EtOAc/hexane (2×100 mL), dried in vacuo. The crude, (5R)-3-(3-fluoro-4-iodo-phenyl)-5-[1,2,3]triazol-1-ylmethyl-oxazolidin-2-one (1025, 11.65 g, 12.416 g theoretical, 93.8%) was obtained as off-white powders, which by HPLC/MS and 1H NMR was found to be essentially pure and was directly used in the subsequent reactions without further purification. For 1025: 1H NMR (300 MHz, DMSO-d6) 3.89 (dd, 1H, J=6.4, 9.2 Hz), 4.23 (t, 1H, J=5.4 Hz), 4.84 (d, 211, J=4.9 Hz), 5.12-5.18 (m, 1H), 7.14 (dd, 1H, J=2.4, 8.7 Hz), 7.49 (dd, 1H, J=2.4, 8.7 Hz), 7.76 (d, 1H, J=1.0 Hz, triazole-H), 7.82 (dd, 1H, J=7.5, 8.7 Hz), 8.17 (d, 1H, J=1.0 Hz, triazole-H); C12H10FIN4O2, LCMS (EI) m/e 389 (M++H).

Provenance & Evidence