Sodium Hydroxide → [9-Methoxy-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]methanol

HRID 1629019Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1629019
[H-].[Al+3].[Li+].[H-].[H-].[H-].[CH3:7][O:8][C:9]1[CH:10]=[CH:11][C:12]([C:32](OC)=[O:33])=[C:13]2[C:17]=1[N:16]=[C:15]1[N:18]([C:22]3[C:23]([CH3:31])=[N:24][C:25]([O:29][CH3:30])=[N:26][C:27]=3[CH3:28])[CH2:19][CH2:20][CH2:21][N:14]21.[OH-].[Na+].S([O-])([O-])(=O)=O.[Mg+2]>O1CCCC1.O>[CH3:7][O:8][C:9]1[C:17]2[N:16]=[C:15]3[N:18]([C:22]4[C:23]([CH3:31])=[N:24][C:25]([O:29][CH3:30])=[N:26][C:27]=4[CH3:28])[CH2:19][CH2:20][CH2:21][N:14]3[C:13]=2[C:12]([CH2:32][OH:33])=[CH:11][CH:10]=1

Komponenten

7

Edukt 4

HCID 14798Sodium HydroxideHCID 24083Sulfuric acid magnesium salt (1:1)HCID 21226445Aluminium lithium hydrideHCID 57785995Methyl 9-methoxy-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate

Produkt 1

HCID 57786030[9-Methoxy-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]methanolAusbeute 71,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittel2×HCID 8028TetrahydrofuranLösungsmittel2×

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a suspension of lithium aluminum hydride (0.14 g, 3.69 mmol) in tetrahydrofuran (10 mL) was added dropwise a solution of methyl 9-methoxy-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carboxylate (720 mg, 1.81 mmol) in tetrahydrofuran (30 mL) at 0° C. After stirring at 0° C. for 1 hr, water (0.14 mL), 15% aqueous sodium hydroxide (0.14 mL) and water (0.42 mL) were successively added dropwise to the reaction mixture at 0° C. The mixture was stirred at room temperature for 4 hr and anhydrous magnesium sulfate was added to the mixture. The solid was removed by filtration. The filtrate was concentrated in vacuo and the residue was purified by flash column chromatography on silica gel eluting with a 5-25% methanol/ethyl acetate gradient mixture to give the title compound as a colorless solid (478 mg, 1.29 mmol, 71%).

Aufarbeitung

  1. stirringThe mixture was stirred at room temperature for 4 hr
  2. customThe solid was removed by filtration
  3. concentrationThe filtrate was concentrated in vacuo
  4. customthe residue was purified by flash column chromatography on silica gel eluting with a 5-25% methanol/ethyl acetate gradient mixture

Quellen und Nachweise

ORD-Eintrag
ord-c7d0affc4e954c3b8c94a5ca959067f3
Quelldatensatz
uspto-grants-2014_07
Patentnummer
US08785460B2

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