Butyl iodide → Methyl 1-butyl-1H-indazole-6-carboxylate

HRID 348955

Reaktionsgleichung

[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:10]([O:12][CH3:13])=[O:11])[CH:8]=2)[CH:3]=[N:2]1.[H-].[Na+].I[CH2:17][CH2:18][CH2:19][CH3:20]>CN(C=O)C>[CH2:17]([N:1]1[C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:10]([O:12][CH3:13])=[O:11])[CH:8]=2)[CH:3]=[N:2]1)[CH2:18][CH2:19][CH3:20]

Komponenten

Reaktionsbedingungen

Temperatur: 60 °C

Versuchsvorschrift

To a mixture of methyl 1H-indazole-6-carboxylate (0.95 g) in DMF (10 mL) was added 60% NaH (0.216 g). The mixture was heated to 60° C. and 1-iodobutane (0.61 mL) was added. The mixture was heated at 60° C. for 72 h and 1-iodobutane (0.61 mL) was added every 24 h. The mixture was removed from heat and cooled to room temperature and partitioned between water and ethyl acetate. The layers were separated and the organic layer washed three times with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Column chromatography on silica gel (100 mL) using 5% ethyl acetate in hexanes as eluent to give 0.356 g of the title compound: 1H NMR (CDCl3) δ 0.938, 1.34, 1.92, 3.97, 4.43, 7.73, 7.79, 8.03, 8.18.

Aufarbeitung

temperatureThe mixture was heated at 60° C. for 72 h
customThe mixture was removed
temperaturefrom heat
temperaturecooled to room temperature
custompartitioned between water and ethyl acetate
customThe layers were separated
washthe organic layer washed three times with brine
dry with materialdried over anhydrous magnesium sulfate
concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag: ord-d81560c54f004d1289d76ded3a284b87
Quelldatensatz: uspto-grants-2007_02
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07176242B2

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