Methyl iodide → 2-acetyl-5-bromo-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide
Reaktionsgleichung
[C:1]([C:4]1[O:5][C:6]2[CH:16]=[C:15]([NH:17][S:18]([CH3:21])(=[O:20])=[O:19])[C:14]([Br:22])=[CH:13][C:7]=2[C:8]=1[C:9]([NH:11][CH3:12])=[O:10])(=[O:3])[CH3:2].[C:23]([O-])([O-])=O.[K+].[K+].CI>CN(C=O)C>[C:1]([C:4]1[O:5][C:6]2[CH:16]=[C:15]([N:17]([CH3:23])[S:18]([CH3:21])(=[O:19])=[O:20])[C:14]([Br:22])=[CH:13][C:7]=2[C:8]=1[C:9]([NH:11][CH3:12])=[O:10])(=[O:3])[CH3:2]Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 60 °C
Versuchsvorschrift
To a solution of 2-acetyl-5-bromo-N-methyl-6-(methylsulfonamido)benzofuran-3-carboxamide (150 mg, 0.38 mmol) in DMF (3 mL) was added K2CO3 (160 mg, 1.16 mmol) and MeI (164 mg, 1.16 mmol). The mixture was heated at 60° C. for 1 hour, concentrated in vacuo to remove DMF and extracted with EtOAc. The combined organic layers were washed with brine, dried over Na2SO4, and concentrated to give crude product. The crude product was purified by column chromatography to give 2-acetyl-5-bromo-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (70 mg, yield: 45%). 1H-NMR (CDCl3, 400 MHz) δ 9.73 (s, 1H), 9.01 (s, 1H), 7.78 (s, 1H), 3.35 (s, 3H), 3.09 (s, 3H), 3.02 (d, J=4.8 Hz, 3H), 2.77 (s, 3H). MS (M+H)+: 403/405.
Aufarbeitung
- concentrationconcentrated in vacuo
- customto remove DMF
- extractionextracted with EtOAc
- washThe combined organic layers were washed with brine
- dry with materialdried over Na2SO4
- concentrationconcentrated
- customto give crude product
- customThe crude product was purified by column chromatography
Quellen und Nachweise
- ORD-Eintrag
- ord-b240ea58c2a2442190108c6bf19a0542
- Quelldatensatz
- uspto-grants-2016_01
- Patentnummer
- US09242998B2
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