Acetic Acid → 1-[(2S,4R,5R)-5-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)-4-hydroxy-tetrahydrofuran-2-yl]propyl acetate

HRID 60714Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 60714
[C:1]([O:4][CH:5]([C@H:8]1[O:12][C@@H:11]([N:13]2[C:17]3[N:18]=[C:19]([NH2:23])[NH:20][C:21](=[O:22])[C:16]=3[S:15][C:14]2=[O:24])[C@@H:10](CC([O-])=O)[CH2:9]1)[CH2:6][CH3:7])(=[O:3])[CH3:2].C([O-])([O-])=[O:30].[K+].[K+].CC(O)=O>CO>[C:1]([O:4][CH:5]([C@@H:8]1[CH2:9][C@@H:10]([OH:30])[C@H:11]([N:13]2[C:17]3[N:18]=[C:19]([NH2:23])[NH:20][C:21](=[O:22])[C:16]=3[S:15][C:14]2=[O:24])[O:12]1)[CH2:6][CH3:7])(=[O:3])[CH3:2]

Komponenten

5

Edukt 3

HCID 176Acetic AcidHCID 11430Potassium CarbonateHCID 137190218[(2R,3R,5S)-5-(1-acetoxypropyl)-2-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)tetrahydrofuran-3-yl]acetate2×

Produkt 1

HCID 1371086961-[(2S,4R,5R)-5-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)-4-hydroxy-tetrahydrofuran-2-yl]propyl acetateAusbeute 88,9 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

To a solution of [(2R,3R,5S)-5-(1-acetoxypropyl)-2-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)tetrahydrofuran-3-yl]acetate (compound 1g, 7.0 g, 16.9 mmol) in methanol (200 mL) was added K2CO3 (1.18 g, 8.5 mmol). After being stirred at room temperature for 12 hours, the reaction mixture was adjusted to pH 6.0 by addition of HOAc (1.2 g, 17 mmol), concentrated in vacuo and the residue was purified by column chromatography on silica gel (eluting with 1:2 EtOAc in petroleum ether) to afford 2.8 g of 1-[(2S,4R,5R)-5-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)-4-hydroxy-tetrahydrofuran-2-yl]propyl acetate (compound 22a) as a yellow solid. MS obsd. (ESI−) [(M−H)+]: 369.

Aufarbeitung

  1. concentrationconcentrated in vacuo
  2. customthe residue was purified by column chromatography on silica gel (eluting with 1:2 EtOAc in petroleum ether)

Quellen und Nachweise

ORD-Eintrag
ord-359a9a305e074d8d93f6e7265ee1aca4
Quelldatensatz
uspto-grants-2016_09
Patentnummer
US09441008B2

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