1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 1-[(R)-3-(2-{4-[1-(2-Ethoxy-ethyl)-1H-benzoimidazol-2-yl]-[1,4]diazepan-1-yl}-ethyl)-3-phenyl-pyrrolidin-1-yl]-1-[2-methoxy-5-(2-methoxy-ethoxy)-phenyl]-methanone

HRID 2230727Notes

Reaction equation

HRID 2230727 reaction equation
Cl.Cl.[CH2:3]([O:5][CH2:6][CH2:7][N:8]1[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=2[N:10]=[C:9]1[N:17]1[CH2:23][CH2:22][CH2:21][N:20]([CH2:24][CH2:25][C@:26]2([C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)[CH2:30][CH2:29][NH:28][CH2:27]2)[CH2:19][CH2:18]1)[CH3:4].[CH3:37][O:38][C:39]1[CH:47]=[CH:46][C:45]([O:48][CH2:49][CH2:50][O:51][CH3:52])=[CH:44][C:40]=1[C:41](O)=[O:42].CN(C)CCCN=C=NCC.O.ON1C2C=CC=CC=2N=N1>ClCCl>[CH2:3]([O:5][CH2:6][CH2:7][N:8]1[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=2[N:10]=[C:9]1[N:17]1[CH2:23][CH2:22][CH2:21][N:20]([CH2:24][CH2:25][C@:26]2([C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)[CH2:30][CH2:29][N:28]([C:41]([C:40]3[CH:44]=[C:45]([O:48][CH2:49][CH2:50][O:51][CH3:52])[CH:46]=[CH:47][C:39]=3[O:38][CH3:37])=[O:42])[CH2:27]2)[CH2:19][CH2:18]1)[CH3:4]

Participants

6

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 27960291-Hydroxybenzotriazole hydrateHCID 184648502-Methoxy-5-(2-methoxy-ethoxy)-benzoic acidHCID 701481071-(2-ethoxy-ethyl)-2-{4-[2-((S)-3-phenyl-pyrrolidin-3-yl)-ethyl]-[1,4]diazepan-1-yl}-1H-benzoimidazole dihydrochloride

Product 1

HCID 599022691-[(R)-3-(2-{4-[1-(2-Ethoxy-ethyl)-1H-benzoimidazol-2-yl]-[1,4]diazepan-1-yl}-ethyl)-3-phenyl-pyrrolidin-1-yl]-1-[2-methoxy-5-(2-methoxy-ethoxy)-phenyl]-methanoneYield 79.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

Stir a mixture of 1-(2-ethoxy-ethyl)-2-{4-[2-((S)-3-phenyl-pyrrolidin-3-yl)-ethyl]-[1,4]diazepan-1-yl}-1H-benzoimidazole dihydrochloride (0.32 g, 0.6 mmol, Preparation 12.1), 2-methoxy-5-(2-methoxy-ethoxy)-benzoic acid (0.16 g, 0.72 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (0.14 g, 0.72 mmol), 1-hydroxybenzotriazole hydrate (0.097 g, 0.72 mmol), diisopropyoethylamine (0.2 mL, 1.2 mmol) and dichloromethane (20 mL) overnight at room temperature. Dilute the reaction mixture with dichloromethane, wash with saturated brine, dry (MgSO4) the organic phase, filter and concentrate the filtrate in vacuo. Purify the residue by column chromatography on silica gel eluting sequentially with ethyl acetate, 5% methanol in dichloromethane and 10% methanol in dichloromethane. Concentrate the appropriate fractions to afford 0.32 g of the title compound, Rf=0.46 (silica gel, 10% methanol in dichloromethane). The compound may be converted to the dihydrochloride salt by methods well known in the art.

Workup

  1. washwash with saturated brine
  2. dry with materialdry (MgSO4) the organic phase
  3. filtrationfilter
  4. concentrationconcentrate the filtrate in vacuo
  5. customPurify the residue by column chromatography on silica gel eluting sequentially with ethyl acetate, 5% methanol in dichloromethane and 10% methanol in dichloromethane
  6. concentrationConcentrate the appropriate fractions

Sources & evidence

ORD record
ord-f5f11a379fb442dcb17f1713ae2cea53
Source dataset
uspto-grants-2002_07
Patent number
US06423704B1

Reaction notes

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