Sulfuric Acid → (7R,8R,9R)-2,3-dimethyl-8-hydroxy-7-(2-methylthioethyloxy)-9-phenyl-7,8,9,10-tetrahydroimidazo[1,2-h][1,7]naphthyridine

HRID 1934369Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1934369
[OH:1][C@@H:2]1[C:11]2[CH:10]=[CH:9][N:8]3[C:12]([CH3:16])=[C:13]([CH3:15])[N:14]=[C:7]3[C:6]=2[NH:5][C@H:4]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@H:3]1[OH:23].S(=O)(=O)(O)O.[CH3:29][S:30][CH2:31][CH2:32]O.[OH-].[Na+]>O1CCOCC1.CN(C)C=O>[CH3:15][C:13]1[N:14]=[C:7]2[C:6]3[NH:5][C@H:4]([C:17]4[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=4)[C@@H:3]([OH:23])[C@H:2]([O:1][CH2:32][CH2:31][S:30][CH3:29])[C:11]=3[CH:10]=[CH:9][N:8]2[C:12]=1[CH3:16]

Komponenten

7

Edukt 4

HCID 1118Sulfuric AcidHCID 14798Sodium HydroxideHCID 789252-(Methylthio)ethanolHCID 10215014(7R,8R,9R)-2,3-dimethyl-7,8-dihydroxy-9-phenyl-7,8,9,10-tetrahydro-imidazo[1,2-h][1,7]naphthyridine

Produkt 1

HCID 9929931(7R,8R,9R)-2,3-dimethyl-8-hydroxy-7-(2-methylthioethyloxy)-9-phenyl-7,8,9,10-tetrahydroimidazo[1,2-h][1,7]naphthyridine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Versuchsvorschrift

1 g of (7R,8R,9R)-7,8-dihydroxy-2,3-dimethyl-9-phenyl-7,8,9,10-tetrahydroimidazo[1,2-h][1,7]naphthyridine, dissolved in 30 ml of dioxane and 5 ml of dimethyl-formamide, is admixed with 0.63 g of concentrated sulfuric acid and 1 g of 2-methylmercaptoethanol. The mixture is stirred at RT for 3 h, poured into ice-water (200 ml), adjusted to pH 8 using 2 N aqueous sodium hydroxide solution and extracted three times with methylene chloride. The solvent is stripped off under reduced pressure and the oily residue that remains is purified on silica gel (mobile phase: diethyl ether). This gives 80 mg of the title compound of m.p. 118-9° C. (diisopropyl ether).

Aufarbeitung

  1. extractionextracted three times with methylene chloride
  2. customthe oily residue that remains is purified on silica gel (mobile phase: diethyl ether)

Quellen und Nachweise

ORD-Eintrag
ord-e085237b4e2d4c689ec06e95e47285e4
Quelldatensatz
uspto-grants-2002_05
Patentnummer
US06384048B1

Notizen zur Reaktion

Wird geladen…