Acetonitrile → 9-[(2R)2-Deoxy-3,5-di-O-isobutyryl-2-C-ethynyl-2-fluoro-beta-D-erythro-pentofuranosyl]guanine

HRID 1772298

Reaktionsgleichung

Reaktionsgleichung von HRID 1772298
[C:1]([C@@:3]1([F:20])[C@H:7]([OH:8])[CH2:6][O:5][C@H:4]1[N:9]1[CH:17]=[N:16][C:15]2[C:14](=[O:18])[NH:13][C:12]([NH2:19])=[N:11][C:10]1=2)#[CH:2].C(N([CH2:26][CH3:27])CC)C.[C:28]([O:33][C:34](=[O:38])[CH:35]([CH3:37])[CH3:36])(=O)C(C)C.[C:39]([O-:42])(O)=O.[Na+].[C:44](#N)C>CN(C)C1C=CN=CC=1.C(OCC)(=O)C>[C:39]([O:8][C@@H:7]1[C@@H:6]([CH2:28][O:33][C:34](=[O:38])[CH:35]([CH3:36])[CH3:37])[O:5][C@@H:4]([N:9]2[CH:17]=[N:16][C:15]3[C:14](=[O:18])[NH:13][C:12]([NH2:19])=[N:11][C:10]2=3)[C@:3]1([C:1]#[CH:2])[F:20])(=[O:42])[CH:26]([CH3:27])[CH3:44]

Komponenten

8

Edukt 5

HCID 6342AcetonitrileHCID 7346Isobutyric anhydrideHCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 1363439289-[(2R)-2-Deoxy-2-C-ethynyl-2-fluoro-beta-D-erythro-furanosyl]-guanine

Produkt 1

HCID 1361959209-[(2R)2-Deoxy-3,5-di-O-isobutyryl-2-C-ethynyl-2-fluoro-beta-D-erythro-pentofuranosyl]guanine

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 142844-(Dimethylamino)pyridineKatalysatorHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A solution of 9-[(2R)-2-Deoxy-2-C-ethynyl-2-fluoro-β-D-erythro-furanosyl]-guanine (0.16 mmol), 4-dimethylaminopyridine (0.01 mmol), triethylamine (0.48 mmol) and isobutyric anhydride (0.48 mmol), in acetonitrile (1 ml) was stirred at room temperature for 6 hours. The reaction mixture was hydrolysed with a NaHCO3 saturated solution. Ethyl acetate was added. The organic phase was separated, washed with NaCl saturated solution, dried over Na2SO4, filtered and concentrated under reduced pressure. The crude material was purified by flash column chromatography (DCM/EtOH) to yield the title compound White powder. Molecular Formula C20H24FN5O61H NMR (DMSO-d6, 400 MHz) δ (ppm) 1.02-1.22 (m, 12H), 2.53-2.59 (m, 1H), 2.65-2.70 (m, 1H), 4.04 (d, J=4.77 Hz, 1H), 4.35-4.40 (m, 3H), 5.88-5.94 (dd, J=9.39 Hz and J=8.21 Hz, 1H), 6.21-6.25 (d, J=17.28 Hz, 1H), 6.58 (s, 2H), 7.09 (s, 1H), 10.82 (s, 1H). Scan ES+ 450.0 (M+H)+, UV λmax 251 nm

Aufarbeitung

  1. customThe organic phase was separated
  2. washwashed with NaCl saturated solution
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe crude material was purified by flash column chromatography (DCM/EtOH)

Quellen und Nachweise

ORD-Eintrag
ord-e59c7800b08c4d31b526171284682c63
Quelldatensatz
uspto-grants-2016_02
Patentnummer
US09249173B2

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