Dimethyl Sulfoxide → (4-Formyltetrahydropyran-4-yl)carbamic acid tert-butyl ester
Reaktionsgleichung
CS(C)=O.C(Cl)(=O)C(Cl)=O.[C:11]([O:15][C:16](=[O:26])[NH:17][C:18]1([CH2:24][OH:25])[CH2:23][CH2:22][O:21][CH2:20][CH2:19]1)([CH3:14])([CH3:13])[CH3:12].C(N(CC)CC)C>ClCCl>[C:11]([O:15][C:16](=[O:26])[NH:17][C:18]1([CH:24]=[O:25])[CH2:19][CH2:20][O:21][CH2:22][CH2:23]1)([CH3:14])([CH3:12])[CH3:13]Komponenten
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- -65 °C
Versuchsvorschrift
Anhydrous dimethyl sulfoxide (3.0 mL, 42.2 mmol) was added to a −65° C. solution of oxalyl chloride (2.0 mL, 22.9 mmol) in anhydrous dichloromethane (100 mL) and allowed to stir at −65° C. under N2 blanket for 3 minutes, after which time a solution of (4-hydroxymethyl-tetrahydro-pyran-4-yl)-carbamic acid tert-butyl ester (4.89 g, 21.1 mmol) in anhydrous dichloromethane (25 mL) was added. When 25 minutes had elapsed, triethylamine (14.7 mL, 105.5 mmol) was added and the reaction solution allowed to stir for a further 20 minutes at −65° C.; then the cold bath was removed and the reaction warmed to ambient temperature, washed with saturated aqueous sodium chloride (500 mL), dried (MgSO4), and evaporated to afford 4.48 g of clear yellow viscous liquid which was used without further purification. LRMS (ESI) m/z 230.2 [(M+H)+, calcd for C11H20NO4230.3].
Aufarbeitung
- customWhen 25 minutes
- stirringto stir for a further 20 minutes at −65° C.
- customthen the cold bath was removed
- temperaturethe reaction warmed to ambient temperature
- washwashed with saturated aqueous sodium chloride (500 mL)
- dry with materialdried (MgSO4)
- customevaporated
Quellen und Nachweise
- ORD-Eintrag
- ord-1d7bfe9c73174aaabb4bedb2747d1029
- Quelldatensatz
- uspto-grants-2013_04
- Patentnummer
- US08426414B2
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