Triethylamine → (RS)-1-[1-(acenaphthen-1-yl)piperidin-4-yl]-3-[2-(4-methylpiperazin-1-yl)-2-oxoethyl]-1,3-dihydro-2H-benzoimidazol-2-one Dihydrochloride

HRID 230462Notes

Reaction equation

HRID 230462 reaction equation
[CH:1]1([N:13]2[CH2:18][CH2:17][CH:16]([N:19]3[C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=4[N:21]([CH2:28][C:29](O)=[O:30])[C:20]3=[O:32])[CH2:15][CH2:14]2)[C:11]2=[C:12]3[C:7](=[CH:8][CH:9]=[CH:10]2)[CH:6]=[CH:5][CH:4]=[C:3]3[CH2:2]1.[CH3:33][N:34]1[CH2:39][CH2:38][NH:37][CH2:36][CH2:35]1.CCN=C=NCCCN(C)C.[ClH:51].C1C=CC2N(O)N=NC=2C=1.C(N(CC)CC)C>CN(C=O)C.O>[ClH:51].[ClH:51].[CH:1]1([N:13]2[CH2:14][CH2:15][CH:16]([N:19]3[C:23]4[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=4[N:21]([CH2:28][C:29]([N:37]4[CH2:38][CH2:39][N:34]([CH3:33])[CH2:35][CH2:36]4)=[O:30])[C:20]3=[O:32])[CH2:17][CH2:18]2)[C:11]2=[C:12]3[C:7](=[CH:8][CH:9]=[CH:10]2)[CH:6]=[CH:5][CH:4]=[C:3]3[CH2:2]1

Participants

8

Reactant 5

HCID 8471TriethylamineHCID 531671-MethylpiperazineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 23063002(RS)-2-{3-[1-(acenaphthen-1-yl)piperidin-4-yl]-2,3-dihydro-2-oxo-benzoimidazol-1-yl}acetic Acid

Product 1

HCID 23063003(RS)-1-[1-(acenaphthen-1-yl)piperidin-4-yl]-3-[2-(4-methylpiperazin-1-yl)-2-oxoethyl]-1,3-dihydro-2H-benzoimidazol-2-one DihydrochlorideYield 104.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

(RS)-2-{3-[1-(Acenaphthen-1-yl)piperidin-4-yl]-2,3-dihydro-2-oxo-benzoimidazol-1-yl}acetic acid (0.85 g, 2 mmol) was dissolved in DMF (10 ml). 1-Methylpiperazine (0.2 g, 2 mmol), WSC.HCl (0.46 g, 2.4 mmol), HOBt (0.37 g, 2.4 mmol) and triethylamine (0.53 ml, 3.8 mmol) were added and the mixture was stirred at room temperature for 8 hr. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated aqueous ammonium chloride solution, dried over magnesium sulfate, and concentrated. The obtained residue was purified by silica gel column chromatography (chloroform/methanol) and hydrochloric acid/ethanol was added to give the title compound (0.73 g) as a yellow solid.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with water and saturated aqueous ammonium chloride solution
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated
  5. customThe obtained residue was purified by silica gel column chromatography (chloroform/methanol) and hydrochloric acid/ethanol
  6. additionwas added

Sources & evidence

ORD record
ord-09fe8617c24a46098c9166c9dca4dbd4
Source dataset
uspto-grants-2009_07
Patent number
US07566728B2

Reaction notes

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