Triphenylphosphine → HCID 90410666, Verbindung

HRID 1754595Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1754595
[CH2:1]([O:8][CH2:9][C@H:10]([C@H:13]([O:15][Si:16]([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:18])[CH3:17])[CH3:14])[CH2:11]O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:23]([N:31]1[C:36](=[O:37])[C:35]([CH3:38])=[CH:34][NH:33][C:32]1=[O:39])(=[O:30])[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[CH2:1]([O:8][CH2:9][C@@H:10]([CH2:11][N:33]1[CH:34]=[C:35]([CH3:38])[C:36](=[O:37])[N:31]([C:23](=[O:30])[C:24]2[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=2)[C:32]1=[O:39])[C@H:13]([O:15][Si:16]([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:18])[CH3:17])[CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 10933275N3-benzoylthymineHCID 11067317(2R,3R)-2-((benzyloxy)methyl)-3-(tert-butyldimethylsiloxy)butan-1-ol

Produkt 1

HCID 90410666HCID 90410666, VerbindungAusbeute 81 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a cold (ice/water bath) solution of (2R,3R)-2-((benzyloxy)methyl)-3-(tert-butyldimethylsiloxy)butan-1-ol (4) (W.-H. Ham et al. J. Org. Chem. 2000, 65, 8372-8374) 1.5 g, 4.6 mmol), 3-benzoylthymine (1.5 g, 6.5 mmol) and triphenylphosphine (1.71 g, 6.5 mmol) in 50 ml of anhydrous THF was added dropwise via syringe with stirring (1.26 ml, 6.5 mmol) of diisopropylazodicarboxylate. The reaction was removed from the bath and stirred at room temperature for 2 hrs and then concentrated. The reaction was diluted with ether (50 ml) and hexane (50 ml) to precipitate some of triphenylphosphine oxide and the DIPADC by-product. The solids were filtered off and the filtrate concentrated. The resultant crude product, which still contained some Ph3PO, was chromatographed on silica eluting with 20% ethyl acetate in hexane. Concentration of the pure product fractions afforded 2.0 g (81%) of 5 as a colorless viscous srup. 1H NMR (CDCl3): δ 7.85 (d, J=8.4 Hz, 2H), 7.58 (t, J=7.5 Hz, 1H), 7.42 (t, J=7.8 Hz, 2H), 7.35-7.25 (m, 5H), 7.06 (d, J=1.2 Hz, 1H), 4.42 (s, 2H), 3.98 (m, 2H), 3.61 (m, 1H), 3.46 (d, J=5.7 Hz, 2H), 2.08 (m, 1H), 1.83 (s, 3H), 1.16 (d, J=6.6 Hz, 3H), 0.84 (s, 9H), 0.02 (s, 3H), 0.00 (s, 3H).

Aufarbeitung

  1. customThe reaction was removed from the bath
  2. concentrationconcentrated
  3. additionThe reaction was diluted with ether (50 ml) and hexane (50 ml)
  4. customto precipitate some of triphenylphosphine oxide
  5. filtrationThe solids were filtered off
  6. concentrationthe filtrate concentrated
  7. customwas chromatographed on silica eluting with 20% ethyl acetate in hexane

Quellen und Nachweise

ORD-Eintrag
ord-6367e2a10f124a00bf0b6ba058e24a95
Quelldatensatz
uspto-grants-2015_10
Patentnummer
US09169256B2

Notizen zur Reaktion

Wird geladen…