Diethyl Ether → HCID 15698114, Verbindung

HRID 653904Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 653904
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[O:18])[CH:9]([CH2:15][CH:16]=C)[C:10]([O:12][CH2:13][CH3:14])=[O:11])=[CH:4][CH:3]=1.I([O-])(=O)(=O)=[O:20].[Na+].CCOCC>[Os](=O)(=O)(=O)=O.O>[C:10]([CH:9]([C:8]([C:5]1[CH:6]=[CH:7][C:2]([CH3:1])=[CH:3][CH:4]=1)=[O:18])[CH2:15][CH:16]=[O:20])([O:12][CH2:13][CH3:14])=[O:11]

Komponenten

6

Edukt 3

HCID 3283Diethyl EtherHCID 15698113Ethyl 3-(4-methylphenyl)-3-oxo-2-(allyl)propanoateHCID 23667635Sodium periodate2×

Produkt 1

HCID 15698114HCID 15698114, VerbindungAusbeute 87 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 30318Osmium TetroxideKatalysator3×HCID 962WaterLösungsmittel

Versuchsvorschrift

Ethyl 3-(4-methylphenyl)-3-oxo-2-(allyl)-propanoate (74.21 g, 301 mmol, 1.0 eq), osmium tetroxide (100 mg, cat.), sodium metaperiodate (141.8 g, 663 mmol, 2.2 eq), ether (500 mL) and water (1 L) were mixed and stirred at room temperature. After 24 hours, an additional 100 mg of OsO4 was added and after another 24 hours, 200 mg more of OsO4 was added together with sodium metaperiodate (190 g, 888 mmol, 3.0 eq). After 4 days, the layers were separated and the ether layer washed with aqueous sodium bisulfite (1×500 mL) followed by brine (1×300 mL). The ether layer was dried (MgSO4) and the solvent removed in vacuo to yield 64.99 g of a dark brown oil. This oil was flash chromatographed over silica gel in 4:1 hexane/ethyl acetate to yield 37.5 g of an amber oil. NMR (200 MH, CDCl3 ) δ 9.79 (s, 1H); 7.93 (d, 2H, J=9Hz); 7.27 (d, 2H, J=9Hz); 4.87 (t, 1H, J=7Hz); 4.13 (q, 2, J=7Hz); 3.37-3.08 (AB multiplet, 2H); 2.40 (s, 3H); 1.14 (t, 3H, J=7Hz). Anal. Calcd. for C14H16O4 : C, δ.73; H, 6.50. Found: C, δ.53; H, 6.54.

Aufarbeitung

  1. waitAfter 4 days
  2. customthe layers were separated
  3. washthe ether layer washed with aqueous sodium bisulfite (1×500 mL)
  4. dry with materialThe ether layer was dried (MgSO4)
  5. customthe solvent removed in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-d1669ed9776e46209a03413535568316
Quelldatensatz
uspto-grants-1992_07
Patentnummer
US05128355

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