Acetic Acid → HCID 68476364, compound

HRID 2089567Notes

Reaction equation

HRID 2089567 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]2[C:8](=[C:9]([N+:11]([O-:13])=[O:12])[CH:10]=1)[NH:7][C:6]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[C:5]2[CH:20]=O.C(O)(=O)C.[O:26]=[C:27]1[CH2:32][NH:31][CH2:30][CH2:29][NH:28]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClC(Cl)C.O>[Cl:1][C:2]1[CH:3]=[C:4]2[C:8](=[C:9]([N+:11]([O-:13])=[O:12])[CH:10]=1)[NH:7][C:6]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[C:5]2[CH2:20][N:31]1[CH2:30][CH2:29][NH:28][C:27](=[O:26])[CH2:32]1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 231360Piperazin-2-oneHCID 5049666Sodium triacetoxyborohydrideHCID 866438345-Chloro-3-formyl-7-nitro-2-phenyl-1H-indole

Product 1

HCID 68476364HCID 68476364, compoundYield 86.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 63651,1-DichloroethaneSolvent

Procedure

5-Chloro-3-formyl-7-nitro-2-phenyl-1H-indole (0.5 g, 1.66 mmol) prepared in Step A was dissolved in dichloroethane (20 mL). Acetic acid (0.10 g, 1.66 mmol), 2-oxopiperazine (0.3 g, 3.32 mmol) and sodium triacetoxyborohydride (0.71 g, 3.32 mmol) were added in drops thereto, and the mixture was stirred for 4 h at room temperature. After completion of the reaction, the reaction mixture was diluted with water, extracted with dichloromethane, washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and filtered. The solvent was removed under reduced pressure, and the residue was purified by column chromatography to give the title compound (0.55 g, Yield 86%).

Workup

  1. customAfter completion of the reaction
  2. extractionextracted with dichloromethane
  3. washwashed with saturated aqueous sodium chloride solution
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. customThe solvent was removed under reduced pressure
  7. customthe residue was purified by column chromatography

Sources & evidence

ORD record
ord-2b1baf304c0f44929a6d0ffbeee4dcb0
Source dataset
uspto-grants-2013_05
Patent number
US08436038B2

Reaction notes

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