Tetrabutylammonium Fluoride Trihydrate → HCID 69124594, compound

Participants

Reaction Steps

(4S)-3-[(2R,5S)-2-[(S)-[2-(Allyloxy)-4-bromophenyl](anilino)methyl]-5-{[tert-butyl(dimethyl)silyl]oxy}-5-(4-fluorophenyl)pentanoyl]-4-benzyl-1,3-oxazolidin-2-one (1.2 g, 1.5 mmol) was dissolved in anhydrous methyl tert-butyl ether (10 mL) and stirred at room temperature under nitrogen. N,O-bistrimethylsilylacetamide (1.1 mL, 4.5 mmol) was added followed by a catalytic amount (˜5 mg) of tetrabutylammonium fluoride trihydrate. The reaction was stirred at room temperature for 19 h, quenched at room temperature with glacial acetic acid (160 μL) and partitioned between ethyl acetate and water and separated. The aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with a saturated sodium bicarbonate solution, water, brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by chromatography (120 g silica gel, 1% to 85% ethyl acetate-hexane) to afford (3R,4S)-4-[2-(allyloxy)-4-bromophenyl]-3-[(3S)-3-{[tert-butyl(dimethyl)silyl]oxy}-3-(4-fluorophenyl)propyl]-1-phenylazetidin-2-one (816 mg, 87% yield); Rf 0.56 (1:4 ethyl acetate-hexane).

Provenance & Evidence