Methyl 4-(4-oxo-chroman-3-ylidenemethyl)-benzoate → Methyl 4-chroman-3-ylmethyl-benzoate

HRID 736490

Reaktionsgleichung

Reaktionsgleichung von HRID 736490
O=[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[O:5][CH2:4][C:3]1=[CH:12][C:13]1[CH:22]=[CH:21][C:16]([C:17]([O:19][CH3:20])=[O:18])=[CH:15][CH:14]=1>CO.CC(N(C)C)=O.[Pd]>[O:5]1[C:6]2[C:11](=[CH:10][CH:9]=[CH:8][CH:7]=2)[CH2:2][CH:3]([CH2:12][C:13]2[CH:14]=[CH:15][C:16]([C:17]([O:19][CH3:20])=[O:18])=[CH:21][CH:22]=2)[CH2:4]1

Komponenten

5

Edukt 1

HCID 4240115Methyl 4-(4-oxo-chroman-3-ylidenemethyl)-benzoate

Produkt 1

HCID 22478793Methyl 4-chroman-3-ylmethyl-benzoateAusbeute 59,4 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 23938PalladiumKatalysatorHCID 887MethanolLösungsmittelHCID 31374DimethylacetamideLösungsmittel

Versuchsvorschrift

Pd/C 10% was added to a suspension of 260 (200 mg, 0.68 mmol) in MeOH (40 ml) and DMA (10 ml) which was previously purged under vacuum. The reaction mixture was stirred during 4 h at room temperature. After evaporation of the MeOH, water was added to the oily residue and the precipitate obtained was filtered. The crude residue was then purified by flash chromatography on silica gel (5-8% AcOEt/Hex)to afford the title compound 263 (114 mg, 59%) as a white solid. LRMS: 282.1 (Calc.); 283.0 (found).

Aufarbeitung

  1. customwas previously purged under vacuum
  2. customAfter evaporation of the MeOH, water
  3. additionwas added to the oily residue
  4. customthe precipitate obtained
  5. filtrationwas filtered
  6. customThe crude residue was then purified by flash chromatography on silica gel (5-8% AcOEt/Hex)to

Quellen und Nachweise

ORD-Eintrag
ord-3e9170b0a1944cccba1345d3119a7dea
Quelldatensatz
uspto-grants-2009_09
Patentnummer
US07595343B2

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