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Benzenesulfonamide, 3-amino- → 3-(4-fluoro-2-methoxyphenoxy)-N-(3-sulfamoylphenyl)quinoxaline-2-carboxamide

HRID 2280571
Notes
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Reaction equation

HRID 2280571 reaction equation
[F:1][C:2]1[CH:21]=[CH:20][C:5]([O:6][C:7]2[C:8]([C:17]([OH:19])=O)=[N:9][C:10]3[C:15]([N:16]=2)=[CH:14][CH:13]=[CH:12][CH:11]=3)=[C:4]([O:22][CH3:23])[CH:3]=1.[NH2:24][C:25]1[CH:26]=[C:27]([S:31]([NH2:34])(=[O:33])=[O:32])[CH:28]=[CH:29][CH:30]=1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CN1CCOCC1>CN(C=O)C>[F:1][C:2]1[CH:21]=[CH:20][C:5]([O:6][C:7]2[C:8]([C:17]([NH:24][C:25]3[CH:30]=[CH:29][CH:28]=[C:27]([S:31](=[O:33])(=[O:32])[NH2:34])[CH:26]=3)=[O:19])=[N:9][C:10]3[C:15]([N:16]=2)=[CH:14][CH:13]=[CH:12][CH:11]=3)=[C:4]([O:22][CH3:23])[CH:3]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 7377Benzenesulfonamide, 3-amino-HCID 79724-MethylmorpholineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 867295573-(4-Fluoro-2-methoxy-phenoxy)quinoxaline-2-carboxylic acid

Product 1

HCID 78319767
3-(4-fluoro-2-methoxyphenoxy)-N-(3-sulfamoylphenyl)quinoxaline-2-carboxamide
Yield 37.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 3-(4-fluoro-2-methoxy-phenoxy)quinoxaline-2-carboxylic acid (47.1 mg, 0.15 mmol), 3-aminobenzenesulfonamide (31.0 mg, 0.18 mmol), HATU (62.7 mg, 0.16 mmol) and N-methylmorpholine (32.98 μL, 0.30 mmol) in DMF (0.5 mL) was stirred at 50° C. for 30 min. Purification was by reverse phase HPLC using a gradient of 1-99% ACN in Water (HCl modifier). The fractions containing the product were evaporated to dryness. The residue was then taken up in ethyl acetate and water and the pH of the solution was adjusted to −8 with a saturated solution of NaHCO3 in water (˜3 drops). The layers separated and the aqueous layer was extracted with ethyl acetate (3×). All organic were combined, evaporated and purification by silica gel column chromatography using a gradient of ethyl acetate in hexanes (5 to 70%) gave 3-(4-fluoro-2-methoxy-phenoxy)-N-(3-sulfamoylphenyl)quinoxaline-2-carboxamide (2) (26.10 mg, 37%) as a white solid. ESI-MS m/z calc. 468.09, found 469.3 (M+1)+; Retention time: 1.49 minutes (3 minutes run). 1H NMR (400 MHz, DMSO) δ 11.27 (s, 1H), 8.42 (s, 1H), 8.18 (d, J=8.0 Hz, 1H), 7.97-7.87 (m, 1H), 7.86-7.71 (m, 3H), 7.68-7.56 (m, 2H), 7.44 (s, 2H), 7.34 (dd, J=8.7, 5.9 Hz, 1H), 7.16 (dd, J=10.8, 2.9 Hz, 1H), 6.88 (ddd, J=8.6, 2.9 Hz, 1H), 3.71 (s, 3H) ppm.

Workup

  1. customPurification
  2. additionThe fractions containing the product
  3. customwere evaporated to dryness
  4. customThe layers separated
  5. extractionthe aqueous layer was extracted with ethyl acetate (3×)
  6. customevaporated
  7. custompurification by silica gel column chromatography

Sources & evidence

ORD record
ord-40d27c1fe7df4f35818269b8250987ca
Source dataset
uspto-grants-2015_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09139529B2

Reaction notes

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