1-[4-(3-t-Butyldiphenylsilyloxyazetidine-1-carbonyl)-1,3-oxazol-2-yl]-3-methanesulfonyloxyazetidine → 3-Acetylthio-1-[4-(3-t-butyldiphenylsilyloxyazetidine-1-carbonyl)-1,3-oxazol-2-yl]azetidine

HRID 891818Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 891818
[Si:1]([O:18][CH:19]1[CH2:22][N:21]([C:23]([C:25]2[N:26]=[C:27]([N:30]3[CH2:33][CH:32](OS(C)(=O)=O)[CH2:31]3)[O:28][CH:29]=2)=[O:24])[CH2:20]1)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:39]([O-:42])(=[S:41])[CH3:40].[K+]>CN(C)C=O>[C:39]([S:41][CH:32]1[CH2:33][N:30]([C:27]2[O:28][CH:29]=[C:25]([C:23]([N:21]3[CH2:20][CH:19]([O:18][Si:1]([C:14]([CH3:17])([CH3:16])[CH3:15])([C:2]4[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=4)[C:8]4[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=4)[CH2:22]3)=[O:24])[N:26]=2)[CH2:31]1)(=[O:42])[CH3:40]

Komponenten

4

Edukt 2

HCID 222428271-[4-(3-t-Butyldiphenylsilyloxyazetidine-1-carbonyl)-1,3-oxazol-2-yl]-3-methanesulfonyloxyazetidineHCID 23670855Potassium ethanethioate

Produkt 1

HCID 222429903-Acetylthio-1-[4-(3-t-butyldiphenylsilyloxyazetidine-1-carbonyl)-1,3-oxazol-2-yl]azetidineAusbeute 57,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a solution of 1-[4-(3-t-butyldiphenylsilyloxyazetidine-1-carbonyl)-1,3-oxazol-2-yl]-3-methanesulfonyloxyazetidine (1.56 g, 2.81 mmol) (obtained as described in Reference Example 74(2)) in dimethylformamide (80 ml) was added potassium thioacetate (1.92 g, 16.8 mmol) at room temperature and the mixture was stirred in an oil bath (80° C.) for 7.5 hours. After checking the completion of the reaction, the mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution. The organic layer was washed with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using n-hexane:ethyl acetate (2:1→1:1) as the eluant to afford 3-acetylthio-1-[4-(3-t-butyldiphenylsilyloxyazetidine-1-carbonyl)-1,3-oxazol-2-yl]azetidine (863 mg, yield 57%) as a pale brown solid.

Aufarbeitung

  1. customat room temperature
  2. customthe completion of the reaction
  3. customthe mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution
  4. washThe organic layer was washed with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by chromatography on a silica gel column

Quellen und Nachweise

ORD-Eintrag
ord-6defc27ef4e947e5840960902406af16
Quelldatensatz
uspto-grants-2006_02
Patentnummer
US07001897B2

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