Cesium carbonate → 2-tert-butyl-4-chloro-5-(2-tert-butyldimethylsilyloxy-1-(4-tert-butylphenyl)-1-ethyl)oxy-3(2H)-pyridazinone

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Reaktionsgleichung

[C:1]([N:5]1[C:10](=[O:11])[C:9]([Cl:12])=[C:8](Cl)[CH:7]=[N:6]1)([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[Cs+].[Cs+].[Si:20]([O:27][CH2:28][CH:29]([OH:40])[C:30]1[CH:35]=[CH:34][C:33]([C:36]([CH3:39])([CH3:38])[CH3:37])=[CH:32][CH:31]=1)([C:23]([CH3:26])([CH3:25])[CH3:24])([CH3:22])[CH3:21]>C(OCC)(=O)C>[C:1]([N:5]1[C:10](=[O:11])[C:9]([Cl:12])=[C:8]([O:40][CH:29]([C:30]2[CH:31]=[CH:32][C:33]([C:36]([CH3:39])([CH3:38])[CH3:37])=[CH:34][CH:35]=2)[CH2:28][O:27][Si:20]([C:23]([CH3:26])([CH3:25])[CH3:24])([CH3:21])[CH3:22])[CH:7]=[N:6]1)([CH3:4])([CH3:3])[CH3:2]

Komponenten

Reaktionsbedingungen

Temperatur: 70 °C

Versuchsvorschrift

To a solution of 2-tert-butyl-4,5-dichloro-3(2H)-pyridazinone (0.5 g, 2.27 mmol) in DMP (10 ml) were added anhydrous cesium carbonate (0.74 g, 2.27 mmol) and 1-tert-butyldimethylsilyloxy 2-hydroxy 2-(4-tertbutylphenyl)ethane (0.7 g, 2.27 mmol). The mixture is stirred for 2 hours at 70° C. and then cooled to room temperature and ethyl acetate is added to it. The solution is then washed with water, dried and concentrated and the residue subjected to purification by flash chromatography (silica gel; ethyl acetate/hexanes) to give the above compound.

Aufarbeitung

temperaturecooled to room temperature
washThe solution is then washed with water
customdried
concentrationconcentrated
customthe residue subjected to purification by flash chromatography (silica gel; ethyl acetate/hexanes)
customto give the above compound

Quellen und Nachweise

ORD-Eintrag: ord-05c7afc7dde640f3bb3bf5cc04affeb7
Quelldatensatz: uspto-grants-2012_07
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08226929B2

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