Reaktion #1135560

Reaktionsgleichung

NaCl

(3R,5R,6S)-3-allyl-1-((S)-1-(tert-butyldiphenylsilyloxy)butan-2-yl)-5-(3-chlorophenyl)-6-(4-chlorophenyl)piperidin-2-one

(3R,5R,6S)-3-allyl-1-((S)-1-((tert-butyldiphenylsilyl)oxy)butan-2-yl)-5-(3-chlorophenyl)-6-(4-chlorophenyl)piperidin-2-one

sodium periodate

EtOAc

HCl

→

title compound

2-((3S,5R,6S)-1-((S)-1-((tert-butyldiphenylsilyl)o xy)butan-2-yl)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-2-oxopiperidin-3-yl)acetic acid

Lösungsmittel

water acetonitrile CCl4

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationthe mixture was filtered
2. 2
   Sonstigeto remove the emulsion
3. 3
   SonstigeThe layers of the filtrate were separated
4. 4
   TrocknenThe organic layer was dried over Na2SO4
5. 5
   Einengenconcentrated under reduced pressure
6. 6
   SonstigeThe residue was purified by flash chromatography on silica gel (24 g column; eluent: 0 to 50% EtOAc in hexanes)

Vorschrift

To a solution of (3R,5R,6S)-3-allyl-1-((S)-1-(tert-butyldiphenylsilyloxy)butan-2-yl)-5-(3-chlorophenyl)-6-(4-chlorophenyl)piperidin-2-one (816 mg, 1.216 mmol; Example 127, Step A) in water/acetonitrile/CCl4 (7 mL/5 mL/5 mL) at room temperature was added sodium periodate (1041 mg, 4.87 mmol) and ruthenium chloride hydrate (27.4 mg, 0.122 mmol). The mixture was stirred vigorously at room temperature for 3 h. The mixture was diluted with EtOAc and acidified with 1 M HCl. Sat. aq. NaCl solution was added and the mixture was filtered to remove the emulsion. The layers of the filtrate were separated. The organic layer was dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (24 g column; eluent: 0 to 50% EtOAc in hexanes) to give the title compound.

Quelle