Reaktion #1569481

Reaktionsgleichung

Trifluoroacetic acid

(2R,3S,4R,5R)-2-((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-(phosphonooxymethyl)tetrahydrofuran-3-yloxy)(hydroxy)phosphoryloxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-(tert-butyldimethylsilyloxy)acetate

Compound 22

(2R,3S,4R,5R)-2-((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-(phosphonooxymethyl)tetrahydrofuran-3-yloxy)(hydroxy)phosphoryloxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-(tert-butyldimethylsilyloxy)acetate

→

(2R,3S,4R,5R)-2-((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-(phosphonooxymethyl)tetrahydrofuran-3-yloxy)(hydroxy)phosphoryloxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-hydroxyacetate

Ausbeute 23.2%

Lösungsmittel

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Einengenconcentration under reduced pressure
2. 2
   Sonstigethe resulting residue was purified by reverse-phase silica gel column chromatography (0.1% aqueous formic acid solution/0.1% formic acid-acetonitrile solution)

Vorschrift

Trifluoroacetic acid (2 ml) was added to a solution of (2R,3S,4R,5R)-2-((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-(phosphonooxymethyl)tetrahydrofuran-3-yloxy)(hydroxy)phosphoryloxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-(tert-butyldimethylsilyloxy)acetate (Compound 22) (70.0 mg, 87 μmol) in dichloromethane (2 ml) at room temperature, and the mixture was stirred at the same temperature for 30 minutes. Following concentration under reduced pressure, the resulting residue was purified by reverse-phase silica gel column chromatography (0.1% aqueous formic acid solution/0.1% formic acid-acetonitrile solution) to afford (2R,3S,4R,5R)-2-((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-(phosphonooxymethyl)tetrahydrofuran-3-yloxy)(hydroxy)phosphoryloxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-hydroxyacetate (HOGly-pdCpA) (Compound 20) (14.0 mg, 23%).

Quelle