Benzyl Bromide → HCID 18686046, Verbindung

HRID 278281Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 278281
[OH:1][CH2:2][C@@H:3]1[C@H:7]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([F:14])[CH:9]=2)[CH2:6][C:5](=[CH2:15])[CH2:4]1.[CH2:16](Br)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.[H-].[Na+]>CN(C=O)C.CCOCC>[CH2:16]([O:1][CH2:2][C@@H:3]1[C@H:7]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([F:14])[CH:9]=2)[CH2:6][C:5](=[CH2:15])[CH2:4]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Komponenten

6

Edukt 3

HCID 7498Benzyl BromideHCID 24758Sodium hydrideHCID 18686049HCID 18686049, Verbindung

Produkt 1

HCID 18686046HCID 18686046, VerbindungAusbeute 47,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittelHCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

To a solution of 3-(S)-(hydroxymethyl)-4-(R)-(3-fluorophenyl)-1-methylenecyclopentane (3.11 g, 16.5 mmol) from Example 65, Step C in DMF (100 mL) was added benzyl bromide (4.24 g, 24.8 mmol) and then sodium hydride (60% in mineral oil, 0.73 g, 18.2 mmol) portionwise over 5 min. The reaction was stirred at rt for 16 h, then diluted with ether (100 mL) and quenched slowly into aq. sodium bicarbonate (200 mL). The layers were separated and the aqueous was extracted with ether. The organic layers were washed 3× with water, then brine, dried over sodium sulfate and concentrated. The residue (7 g) was purified by FC using 0.5-1% ethyl acetate in hexanes to afford the title compound (2.32 g).

Aufarbeitung

  1. customquenched slowly into aq. sodium bicarbonate (200 mL)
  2. customThe layers were separated
  3. extractionthe aqueous was extracted with ether
  4. washThe organic layers were washed 3× with water
  5. dry with materialbrine, dried over sodium sulfate
  6. concentrationconcentrated
  7. customThe residue (7 g) was purified by FC

Quellen und Nachweise

ORD-Eintrag
ord-8326f02bdadf4d7cbd80e2b7830649bc
Quelldatensatz
uspto-grants-2002_03
Patentnummer
US06358979B1

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