反应详情

methyl 2″-({(4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-2-oxo-1,3-oxazolidin-3-yl}methyl)-6′-fluoro-4′-methoxy-3-methyl-4″-(trifluoromethyl)-1,1′:3′,1″-terphenyl-4-carboxylate (55 mg, 0.074 mmol), lithium hydroxide monohydrate (31 mg, 0.74 mmol), water (1 mL) and 1,4-dioxane (2 mL) were stirred at room temperature overnight. LCMS trace of reaction aliquot indicated completion of reaction. Crude mixture was acidified by HCl (1N aq.). Volatiles were removed under reduced pressure. Pot residue was dissolved in a water/MeCN mixture and purified by reverse-phase prep-HPLC (Kromasil 100-5C18, 100×21.1 mm) eluting w/a MeCN (0.1% TFA, v/v)/H2O (0.1% TFA, v/v) gradient mixture. Corresponding fractions were pooled & evaporated in vacuo to afford a light yellow glass. This residue was dissolved in EtOAc and washed w/water (10 mL×2), separated, dried/Na2SO4, filtered and concentrated to afford the title compound. LCMS (ESI) calc.=729.16; found=730.15 (M+1)1. 1H NMR (CDCl3, 500 MHz, 1:1 mixture of atropisomers): δ 8.10 (t, J=7.8 Hz, 1H), 7.85 (d, J=5 Hz, 1H), 7.70 (s, 1.5H), 7.66 (d, J=8 Hz, 1H), 7.62 (s, 1.5H), 7.47-7.38 (m, 3H), 7.30-7.25 (m, 1H), 6.85 (dd, J=12.5, 3 Hz, 1H), 5.61 (d, J=8 Hz, 0.5H), 5.31 (d, J=8 Hz, 0.5H), 4.94 (d, J=4.5 Hz, 0.5H), 4.91 (d, J=4 Hz, 0.5H), 4.15 (d, J=16.5 Hz, 0.5H), 3.93 (d, J=16 Hz, 0.5H), 3.86 (s, 3H), 3.86-3.76 (m, 1H), 2.68 (s, 3H), 0.57 (d, J=6.5 Hz, 1.5H), 0.46 (d, J=6.5 Hz, 1.5H).

1. customLCMS trace of reaction
2. customcompletion of reaction
3. customVolatiles were removed under reduced pressure
4. dissolutionPot residue was dissolved in a water/MeCN mixture
5. custompurified by reverse-phase prep-HPLC (Kromasil 100-5C18, 100×21.1 mm)
6. washeluting w/a MeCN (0.1% TFA, v/v)/H2O (0.1% TFA, v/v) gradient mixture
7. customevaporated in vacuo
8. customto afford a light yellow glass
9. washwashed w/water (10 mL×2)
10. customseparated
11. dry with materialdried/Na2SO4
12. filtrationfiltered
13. concentrationconcentrated