Trifluoroacetic acid → (R)-4-((R)-1-hydroxyethyl)-3-(4-methoxybenzyl)oxazolidin-2-one

Participants

Reaction Steps

A solution of (R)-4-((R)-1-(tert-butoxy)ethyl)-3-(4-methoxybenzyl)oxazolidin-2-one (5.90 g, 19.2 mmol) in CH2Cl2 (40 mL) was treated with TFA (40 mL) at room temperature for min. The reaction mixture was concentrated in vacuo, then diluted with CH2Cl2 (˜50 mL), and again concentrated. This procedure was repeated three times to remove TFA. Flash column chromatography (EtOAc/Heptane 30-100%) gave 3.81 g (R)-4-((R)-1-hydroxyethyl)-3-(4-methoxybenzyl)oxazolidin-2-one. 1H NMR (400 MHz, MeOD) δ 7.31-7.21 (m, 2H), 7.00-6.87 (m, 2H), 4.67 (d, J=15.0 Hz, 1H), 4.34-4.18 (m, 3H), 3.95 (q, J=6.2 Hz, 1H), 3.80 (s, 3H), 3.68 (dt, J=8.7, 5.5 Hz, 1H), 1.09 (d, J=6.4 Hz, 3H). MS m/z 252.2 (M+H).

Provenance & Evidence