Triphenylphosphine → HCID 68711098, Verbindung

HRID 1911507Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1911507
[C:1]([O:5][C:6]([N:8]1[C@H:12]([CH2:13]O)[CH2:11][O:10][C:9]1([CH3:16])[CH3:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].[SH:17][C:18]1[S:19][C:20]2[CH:26]=[CH:25][CH:24]=[CH:23][C:21]=2[N:22]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1.CCOC(C)=O>[C:1]([O:5][C:6]([N:8]1[C@H:12]([CH2:13][S:17][C:18]2[S:19][C:20]3[CH:26]=[CH:25][CH:24]=[CH:23][C:21]=3[N:22]=2)[CH2:11][O:10][C:9]1([CH3:16])[CH3:15])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Komponenten

7

Edukt 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 11053464(R)-4-Hydroxymethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl esterHCID 178418395HCID 178418395, Verbindung

Produkt 1

HCID 68711098HCID 68711098, VerbindungAusbeute 89,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028TetrahydrofuranLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a stirred, cooled (0° C.) solution of (R)-4-hydroxymethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (1.36 g; CAS 108149-65-1), 2-mercaptobenzothiazole (1.48 g) and triphenylphosphine (2.32 g) in THF (80 ml) under an argon atmosphere was added diethyl azodicarboxylate (4.1 ml; 40% solution in toluene). The mixture (soon turning to a yellow suspension, slowly warming up to r.t.) was stirred for 18 h overnight, then diluted with EtOAc and washed with sat. aq. Na2CO3. The aqueous phase was back extracted with EtOAc. The combined organics were washed with brine, dried over MgSO4, filtered and concentrated. The crude product was purified by column chromatography (SiO2; gradient: cyclohexane ->cyclohexane/EtOAc 85:15) to give (S)-4-(benzothiazol-2-ylsulfanyl-methyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (2.0 g) as light yellow viscous oil.

Aufarbeitung

  1. washwashed with sat. aq. Na2CO3
  2. extractionThe aqueous phase was back extracted with EtOAc
  3. washThe combined organics were washed with brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was purified by column chromatography (SiO2; gradient: cyclohexane ->cyclohexane/EtOAc 85:15)

Quellen und Nachweise

ORD-Eintrag
ord-0f204084287c41bc8e9a01811095e675
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08604061B2

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