Ammonia → 3-(3,4-dihydro-7-hydroxy-2-methyl-4-oxo-8-propyl-2H-1-benzopyran-2-yl)propanamide

HRID 477509

Reaktionsgleichung

Reaktionsgleichung von HRID 477509
[OH:1][C:2]1[CH:18]=[CH:17][C:5]2[C:6](=[O:16])[CH2:7][C:8]([CH2:11][CH2:12][C:13](O)=[O:14])([CH3:10])[O:9][C:4]=2[C:3]=1[CH2:19][CH2:20][CH3:21].P(Cl)(Cl)(Cl)(Cl)Cl.[NH3:28]>O1CCCC1>[OH:1][C:2]1[CH:18]=[CH:17][C:5]2[C:6](=[O:16])[CH2:7][C:8]([CH2:11][CH2:12][C:13]([NH2:28])=[O:14])([CH3:10])[O:9][C:4]=2[C:3]=1[CH2:19][CH2:20][CH3:21]

Komponenten

5

Edukt 3

HCID 222AmmoniaHCID 24819Phosphorus pentachlorideHCID 139207383-(3,4-dihydro-7-hydroxy-2-methyl-4-oxo-8-propyl-2H-1-benzopyran-2-yl)propanoic acid

Produkt 1

HCID 139207413-(3,4-dihydro-7-hydroxy-2-methyl-4-oxo-8-propyl-2H-1-benzopyran-2-yl)propanamide

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of the title product of Example 3, (1.0 g, 3.4 mmole) in 50 ml of dry tetrahydrofuran cooled to 0° was added 2.1 g (10.2 mmole) of phosphorus pentachloride. After the mixture was stirred for 30 minutes, approximately 2 ml of liquid ammonia was added, and the solution was warmed to room temperature and stirred for an additional 30 minutes. The solvent was evaporated and the residue was dissolved in ethyl acetate. The organic layer was washed successively with saturated sodium bicarbonate solution, water, and brine, dried over MgSO4, filtered, and concentrated to dryness. The crude product, mp. 108°-115°, was not purified further. Structure assignment was supported by nmr and infrared spectra.

Aufarbeitung

  1. stirringstirred for an additional 30 minutes
  2. customThe solvent was evaporated
  3. dissolutionthe residue was dissolved in ethyl acetate
  4. washThe organic layer was washed successively with saturated sodium bicarbonate solution, water, and brine
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated to dryness
  8. customThe crude product, mp. 108°-115°, was not purified further

Quellen und Nachweise

ORD-Eintrag
ord-56ef9fd635a84e4cb694e51a504288df
Quelldatensatz
uspto-grants-1989_12
Patentnummer
US04888356

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