Reaktionsgleichung
[C:1]1([CH:7]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[O:8][C:9]([CH:11]2[CH:15]([C:16]([OH:18])=[O:17])[CH2:14][C:13](=[O:19])[O:12]2)=[O:10])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:26](O)([CH3:29])([CH3:28])[CH3:27].Cl.C(N=C=NCCCN(C)C)C>CN(C)C1C=CN=CC=1.C(Cl)Cl>[O:19]=[C:13]1[O:12][CH:11]([C:9]([O:8][CH:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[O:10])[CH:15]([C:16]([O:18][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:17])[CH2:14]1Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 2
Versuchsvorschrift
163 mg of (2RS,3SR)-2-diphenylmethoxycarbonyl-5-oxotetrahydrofuran-3-carboxylic acid, 59 mg of 4-dimethylaminopyridine and 36 mg of tert-butanol in 4 ml of methylene chloride were stirred with 110 mg of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride at room temperature for 13 hours. The reaction solution was diluted with methylene chloride, washed successively with 10% aqueous citric acid, saturated aqueous sodium hydrogencarbonate and saturated aqueous sodium chloride and dried over anhydrous magnesium sulfate. The desiccant was filtered off, the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography [hexane/ethyl acetate=10/1] to give 148 mg of the title compound as a colorless oily substance.
Aufarbeitung
- washwashed successively with 10% aqueous citric acid, saturated aqueous sodium hydrogencarbonate and saturated aqueous sodium chloride
- dry with materialdried over anhydrous magnesium sulfate
- filtrationThe desiccant was filtered off
- customthe solvent was evaporated in vacuo
- customThe residue was purified by silica gel column chromatography [hexane/ethyl acetate=10/1]
Quellen und Nachweise
- ORD-Eintrag
- ord-afdba351e3f44124be9445ef648fc085
- Quelldatensatz
- uspto-grants-2000_07
- Patentnummer
- US06083985
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