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Diisopropylethylamine → 1H-pyrrole-2-carboxylic acid [2-(5-benzenesulfonyl-1H-indazol-3-ylcarbamoyl)-5-(4-methyl-piperazin-1-yl)-phenyl]amide

HRID 1640982
Notes
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Reaction equation

HRID 1640982 reaction equation
[NH2:1][C:2]1[CH:28]=[C:27]([N:29]2[CH2:34][CH2:33][N:32]([CH3:35])[CH2:31][CH2:30]2)[CH:26]=[CH:25][C:3]=1[C:4]([NH:6][C:7]1[C:15]2[C:10](=[CH:11][CH:12]=[C:13]([S:16]([C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)(=[O:18])=[O:17])[CH:14]=2)[NH:9][N:8]=1)=[O:5].C(N(CC)C(C)C)(C)C.[NH:45]1[CH:49]=[CH:48][CH:47]=[C:46]1[C:50](Cl)=[O:51]>ClCCl>[C:19]1([S:16]([C:13]2[CH:14]=[C:15]3[C:10](=[CH:11][CH:12]=2)[NH:9][N:8]=[C:7]3[NH:6][C:4]([C:3]2[CH:25]=[CH:26][C:27]([N:29]3[CH2:30][CH2:31][N:32]([CH3:35])[CH2:33][CH2:34]3)=[CH:28][C:2]=2[NH:1][C:50]([C:46]2[NH:45][CH:49]=[CH:48][CH:47]=2)=[O:51])=[O:5])(=[O:18])=[O:17])[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 81531Diisopropylethylamine2×HCID 224558Pyrrole-2-carbonyl chlorideHCID 594370872-amino-N-(5-benzenesulfonyl-1H-indazol-3-yl)-4-(4-methyl-piperazin-1-yl)-benzamide

Product 1

HCID 248257521H-pyrrole-2-carboxylic acid [2-(5-benzenesulfonyl-1H-indazol-3-ylcarbamoyl)-5-(4-methyl-piperazin-1-yl)-phenyl]amideYield 20.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

2-Amino-N-(5-benzenesulfonyl-1H-indazol-3-yl)-4-(4-methyl-piperazin-1-yl)-benzamide (245 mg, 0.5 mmol) was suspended in dichloromethane (10 mL), treated first with neat N,N-diisopropylethylamine (0.35 mL, 2 mmol) then with solid 1H-pyrrole-2-carbonyl chloride (258 mg, 2 mmol). The reaction was stirred at room temperature overnight then treated with additional acid chloride (258 mg) and N,N-diisopropylethylamine (0.35 mL). After two hours the solvent was removed under reduced pressure and the crude was taken up with tetrahydrofuran (30 mL) and treated with 2N NaOH (10 mL). After stirring overnight the solvent was removed and the solid was filtered and washed thoroughly with water. The crude was purified by flash chromatography over silica gel (eluent: ethyl acetate/methanol/aq.33% NH4OH in 9:1:0.1 ratio) to give 60 mg of title compound.

Workup

  1. customAfter two hours the solvent was removed under reduced pressure
  2. additiontreated with 2N NaOH (10 mL)
  3. stirringAfter stirring overnight the solvent
  4. customwas removed
  5. filtrationthe solid was filtered
  6. washwashed thoroughly with water
  7. customThe crude was purified by flash chromatography over silica gel (eluent: ethyl acetate/methanol/aq.33% NH4OH in 9:1:0.1 ratio)

Sources & evidence

ORD record
ord-6ebd8670118846b6817fff1bb6421346
Source dataset
uspto-grants-2012_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08114865B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes