4-Acetylbenzenesulphonamide → HCID 178419032, compound

HRID 10738Notes

Reaction equation

HRID 10738 reaction equation
[C:1]([C:4]1[CH:9]=[CH:8][C:7]([S:10]([NH2:13])(=[O:12])=[O:11])=[CH:6][CH:5]=1)(=[O:3])[CH3:2].[CH:14]1([C:17]2[NH:18][CH:19]=[C:20]([C:22]3[C:23]([O:32][CH3:33])=[CH:24][C:25]([O:30][CH3:31])=[C:26]([CH:29]=3)[CH:27]=O)[N:21]=2)[CH2:16][CH2:15]1.C[O-].[Li+]>CN(C)C=O>[CH:14]1([C:17]2[NH:18][CH:19]=[C:20]([C:22]3[C:23]([O:32][CH3:33])=[CH:24][C:25]([O:30][CH3:31])=[C:26](/[CH:27]=[CH:2]/[C:1]([C:4]4[CH:5]=[CH:6][C:7]([S:10]([NH2:13])(=[O:11])=[O:12])=[CH:8][CH:9]=4)=[O:3])[CH:29]=3)[N:21]=2)[CH2:15][CH2:16]1

Participants

5

Reactant 3

HCID 740654-AcetylbenzenesulphonamideHCID 4177230Lithium methanolateHCID 178418754HCID 178418754, compound

Product 1

HCID 178419032HCID 178419032, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 4-acetyl-benzenesulfonamide (Ex-26A, 0.12 g, 0.59 mmol) and 5-(2-cyclopropyl-1H-imidazol-4-yl)-2,4-dimethoxy-benzaldehyde (Ex-105B, 0.16 g, 0.59 mmol) in N,N-dimethylformamide (16 mL) was added lithium methoxide (1.0M in methanol, 2.4 mL, 2.4 mmol). The reaction mixture was allowed to stir for 18 hours at ambient temperature. The reaction was quenched with water. The aqueous solution was extracted with dichloromethane. The combined dichloromethane was concentrated. The crude product was purified by flash chromatography. Elution with methanol (10%, v/v, in dichloromethane) gave the title compound as red solid: m.p. 156–160° C. 1H NMR (DMSO-d6) δ 11.65 (bs, 1H), 8.32 (s, 1H), 8.19 (d, J=9.0 Hz, 2H), 8.00 (d, J=15.7 Hz, 1H), 7.95 (d, J=9.0 Hz, 2H), 7.62–7.52 (m, 2H), 7.24 (bs, 1H), 6.73 (s, 1H), 3.96 (s, 3H), 3.94 (s, 3H), 1.98–1.94 (m, 1H), 0.88–0.85 (m 4H). MS m/z=454 ([M+H]+, 100%).

Workup

  1. customThe reaction was quenched with water
  2. extractionThe aqueous solution was extracted with dichloromethane
  3. concentrationThe combined dichloromethane was concentrated
  4. customThe crude product was purified by flash chromatography
  5. washElution with methanol (10%, v/v, in dichloromethane)

Sources & evidence

ORD record
ord-bc0bededacff4f5c853c190677c0df9b
Source dataset
uspto-grants-2006_08
Patent number
US07094801B2

Reaction notes

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