Sodium Thiosulfate → 4-[N-dodecyl-N-[2-[4-(3oxo-4,4,4-trifluorobut-1-yl)phenoxy]ethyl]amino]butanoic acid, ethyl ester

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Reaction Conditions

Reaction Steps

A suspension of 1,1,1-triacetoxy-1,1-dihydro-1,2-benziodoxol-3(1H)-one (Dess-Martin periodinane, 1.7 g, 4.0 mmol) in dichloromethane (20 ml) was treated with 4-[N-dodecyl-N-2-[4-[4,4,4-trifluoro-3-hydroxybutyl]phenoxy]ethylamino]butanoic acid, ethyl ester (430 mg, 0.79 mmol) dissolved in dichloromethane (5 ml). The mixture was stirred at 22° C. for 4 h, poured into a saturated aqueous sodium bicarbonate and sodium thiosulfate (100 ml) and extracted with ethyl acetate (2×100 ml). The combined oganic layers were washed with sat. sodium bicarbonate (2×60 ml), brine (60 ml), dried over sodium sulfate and concentrated in vacuo. The residue was chromatographed on silica gel (hexane/ethyl acetate 2:1 to 1.5:1) to afford the title compound (333 mg, 77%) as a colorless oil.

Provenance & Evidence