Sodium Thiosulfate → HCID 58674963, compound

Participants

Reaction Steps

A stirred solution of 3(R,S)-[2(S)-(3-benzoylamino-2-oxo-2H-pyridin-1-yl)-3-phenyl-propionylamino]-5-fluoro-4(R,S)-hydroxy-pentanoic acid tert-butyl ester (1.23 g, 2.23 mmol) in anhydrous DCM (25 mL) was treated with 1,1,1-triacetoxy-1,1-dihydro-1,2-benziodoxol-3(1H)-one (Dess-Martin periodinane) (1.13 g, 2.67 mmol) at 0° C. The resulting mixture was kept at 0° C. for 2 hours, diluted with ethyl acetate, then poured into a 1:1 mixture of saturated aqueous sodium hydrogen carbonate and saturated aqueous sodium thiosulfate. The organic layer was removed and the aqueous layer re-extracted with ethyl acetate. The combined organic extracts were dried (Magnesium sulfate) and concentrated. The residue was purified by flash chromatography (40-60% ethyl acetate/petrol ether) to afford the title compound as a red gum (776 mg, 64%); 1H NMR (400 MHz, CDCl3) δ 1.32-1.40 (3H, s), 2.60 (1H, m), 2.92 (1H, m), 3.27 (1H, m), 3.61 (1H, m), 4.78-4.88 (1H, m), 4.97-5.05 (2H, m), 5.77 (1H, m), 6.43 (1H, m), 7.22-7.38 (7H, m), 7.54-7.65 (3H, m), 7.95 (2H, m), 8.62 (1H, m), 9.22 (1H, m).

Provenance & Evidence