Imidazole → 5-bromo-2-(1H-imidazol-1-yl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide

HRID 595575Notes

Reaction equation

[Br:1][C:2]1[C:3]([N:16]([CH3:21])[S:17]([CH3:20])(=[O:19])=[O:18])=[CH:4][C:5]2[O:9][C:8](I)=[C:7]([C:11]([NH:13][CH3:14])=[O:12])[C:6]=2[CH:15]=1.C([O-])([O-])=O.[K+].[K+].[NH:28]1[CH:32]=[CH:31][N:30]=[CH:29]1>CN(C=O)C>[Br:1][C:2]1[C:3]([N:16]([CH3:21])[S:17]([CH3:20])(=[O:19])=[O:18])=[CH:4][C:5]2[O:9][C:8]([N:28]3[CH:32]=[CH:31][N:30]=[CH:29]3)=[C:7]([C:11]([NH:13][CH3:14])=[O:12])[C:6]=2[CH:15]=1

Participants

Conditions

Temperature: 60 °C

Procedure

To a degassed solution of 5-bromo-2-iodo-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (100 mg, 0.21 mmol) and K2CO3 (43 mg, 0.31 mmol) in DMF (1 mL) was added 1H-imidazole (14 mg, 0.21 mmol) under N2 at 0° C. The mixture was heated at 60° C. for 10 hours. The reaction mixture was concentrated and it was extracted with EtOAc. The residue was washed with H2O, brine, dried over Na2SO4. After being concentrated, the crude product was purified by column (PE:EA=1:1) to give of 5-bromo-2-(1H-imidazol-1-yl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (72 mg, yield: 83%). 1H-NMR (DMSO-d6, 400 MHz) δ 8.40 (d, J=4.4 Hz, 1H), 8.36 (s, 1H), 8.10 (s, 2H), 7.80 (s, 1H), 7.19 (s, 1H), 3.21 (s, 3H), 3.20 (s, 3H), 2.81 (d, J=4.4 Hz, 3H). MS (M+H)+: 427/429.

Workup

concentrationThe reaction mixture was concentrated
extractionit was extracted with EtOAc
washThe residue was washed with H2O, brine
dry with materialdried over Na2SO4
concentrationAfter being concentrated
customthe crude product was purified by column (PE:EA=1:1)

Sources & evidence

ORD record: ord-b29beab373f94097b2c27b8b9077f478
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09242998B2

Reaction notes

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