Water → HCID 66917418, Verbindung

Temperatur

0 °C

A solution of potassium osmate dihydrate (1.19 mg, 0.0034 mmol), hydroquinidine (anthraquinone-1,4-diyl)diether (7.32 mg, 0.00851 mmol), potassium ferricyanide (843 mg, 2.55 mmol) and K2CO3 (357 mg, 2.55 mmol) in t-BuOH/H2O (3.5 mL/4.5 mL) was cooled to 0° C. and a solution of 4-benzenesulfonyl-2-bromo-1-but-3-enyl-benzene (299 mg, 0.851 mmol) in t-BuOH (1 mL) was added. The reaction was maintained at 0° C. for 18 hours, then Na2SO3 (0.68 g) was added at 0° C. The reaction was allowed to warm to room temperature and water was added. The mixture was extracted twice with EtOAc, and the combined extracts were washed with brine, dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified via flash chromatography (hexane/EtOAc) to afford (R)-4-(4-benzenesulfonyl-2-bromo-phenyl)-butane-1,2-diol (193 mg) with 86% ee. Chiral column: Chiralpak AS analytical, hexane/isopropanol (75/25), 1.1 mL/min flow rate.

1. temperatureto warm to room temperature
2. extractionThe mixture was extracted twice with EtOAc
3. washthe combined extracts were washed with brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified via flash chromatography (hexane/EtOAc)

ORD-Eintrag

ord-c9c4a5dc11b145b99e18afa44abca5f1

Quelldatensatz

uspto-grants-2010_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07754759B2