Water → 3'-amino-N-methylbiphenyl-4-sulfonamide

HRID 2242705Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH:11][CH3:12])(=[O:10])=[O:9])=[CH:4][CH:3]=1.[NH2:13][C:14]1[CH:15]=[C:16](B(O)O)[CH:17]=[CH:18][CH:19]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:13][C:14]1[CH:19]=[C:18]([C:2]2[CH:7]=[CH:6][C:5]([S:8]([NH:11][CH3:12])(=[O:10])=[O:9])=[CH:4][CH:3]=2)[CH:17]=[CH:16][CH:15]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of 4-bromo-N-methyl-benzene sulfonamide (2.49 g, 10 mmol) in DMF (20 mL) was added 3-amino-phenyl boronic acid (1.51 g, 11 mmol), Pd(PPh3)4 (90 mg, 0.30 mmol), potassium carbonate (1.52 g, 11 mmol) and water (5 mL). The resulting mixture was degassed by gently bubbling argon through the solution for 5 minutes at 20° C. The reaction mixture was then heated at 80° C. overnight. The reaction was filtered through a pad of silica gel, which was washed with CH2Cl2 (50 mL×3). The combined organics were concentrated under reduced pressure to give crude product, which was washed with EtOAc to give pure 3′-amino-N-methylbiphenyl-4-sulfonamide (C-3) (1.3 g, 50%). 1H NMR (300 MHz, CDCl3) δ 7.85 (d, J=8.7 Hz, 2H), 7.75 (d, J=8.7 Hz, 2H), 7.19 (t, J=7.8 Hz, 1H), 6.95-7.01 (m, 2H), 6.73-6.77 (m, 1H), 2.54 (s, 3H). MS (ESI) m/e (M+H+) 263.0.

Workup

customThe resulting mixture was degassed by gently bubbling argon through the solution for 5 minutes at 20° C
filtrationThe reaction was filtered through a pad of silica gel, which
washwas washed with CH2Cl2 (50 mL×3)
concentrationThe combined organics were concentrated under reduced pressure
customto give crude product, which
washwas washed with EtOAc

Sources & evidence

ORD record: ord-f61ee7dd21164d6eba8ffa52050ea127
Source dataset: uspto-grants-2010_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07671221B2

Reaction notes

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