Sodium Carbonate → 5-bromo-2-(4-formylphenyl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide

HRID 595651Notes

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.[CH:22]([C:24]1[CH:29]=[CH:28][C:27](B(O)O)=[CH:26][CH:25]=1)=[O:23].C([O-])([O-])=O.[Na+].[Na+]>CN(C=O)C.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[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]([C:27]3[CH:28]=[CH:29][C:24]([CH:22]=[O:23])=[CH:25][CH:26]=3)=[C:7]([C:11]([NH:13][CH3:14])=[O:12])[C:6]=2[CH:15]=1

Participants

Conditions

Temperature: 100 °C

Procedure

To a degassed solution of 5-bromo-2-iodo-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (400 mg, 0.82 mmol), (4-formylphenyl) boronic acid (110 mg, 0.74 mmol) and Na2CO3 (174 mg, 1.6 mmol) in DMF (4 mL) was added Pd(dppf)Cl2 (20 mg) under N2, and the mixture was stirred at 100° C. for 2 h. After the solvent was removed, the residue was purified by column chromatography (DCM:EtOAc=10:1) to give the product of 5-bromo-2-(4-formylphenyl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (200 mg, yield: 52%). 1H-NMR (CDCl3, 400 MHz) δ 10.09 (s, 1H), 8.09˜8.15 (m, 3H), 8.02 (s, 2H), 7.75 (s, 1H), 5.90 (br s., 1H), 3.36 (s, 3H), 3.11 (s, 3H), 3.05 (d, J=4.8 Hz, 3H). MS (M+H)+: 465/467.

Workup

customAfter the solvent was removed
customthe residue was purified by column chromatography (DCM:EtOAc=10:1)

Sources & evidence

ORD record: ord-ff30215eca7e46309d2b80e9a8db3429
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09243002B2

Reaction notes

Loading…