Tolvaptan → 7-chloro-1-[2-methyl-4-(2-methyl-benzoylamino)-benzoyl]-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl 4-dimethylaminobutyrate hydrochloride

HRID 1626032Notes

Reaction equation

HRID 1626032 reaction equation
[CH3:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][C:7]=1[C:8]([NH:10][C:11]1[CH:12]=[CH:13][C:14]([C:18]([N:20]2[C:26]3[CH:27]=[CH:28][C:29]([Cl:31])=[CH:30][C:25]=3[CH:24]([OH:32])[CH2:23][CH2:22][CH2:21]2)=[O:19])=[C:15]([CH3:17])[CH:16]=1)=[O:9].Cl.[CH3:34][N:35]([CH3:42])[CH2:36][CH2:37][CH2:38][C:39](O)=[O:40].Cl.CN(C)CCCN=C=NCC.C(=O)([O-])O.[Na+]>CN(C)C1C=CN=CC=1.ClCCl.C(N(CC)CC)C>[ClH:31].[CH3:34][N:35]([CH3:42])[CH2:36][CH2:37][CH2:38][C:39]([O:32][CH:24]1[CH2:23][CH2:22][CH2:21][N:20]([C:18](=[O:19])[C:14]2[CH:13]=[CH:12][C:11]([NH:10][C:8](=[O:9])[C:7]3[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=3[CH3:1])=[CH:16][C:15]=2[CH3:17])[C:26]2[CH:27]=[CH:28][C:29]([Cl:31])=[CH:30][C:25]1=2)=[O:40]

Participants

8

Reactant 4

HCID 216237TolvaptanHCID 516892Sodium BicarbonateHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 126916404-(Dimethylamino)butyric acid hydrochloride

Product 1

HCID 667332517-chloro-1-[2-methyl-4-(2-methyl-benzoylamino)-benzoyl]-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl 4-dimethylaminobutyrate hydrochlorideYield 138.2%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolventHCID 8471TriethylamineSolvent

Procedure

Tolvaptan (1.0 g, 2.2 mmol), 4-dimethylamino-butyric acid hydrochloride (0.48 g, 2.9 mmol), and 4-dimethylaminopyridine (27 mg, 0.22 mmol) were suspended in dichloromethane (5 ml). Triethylamine (0.4 ml) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (WSC) (0.55 g, 2.9 mmol) were added thereto, and the mixture was stirred at room temperature for 12 hours. An aqueous saturated sodium hydrogen carbonate solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with an aqueous saturated sodium chloride solution, dried over anhydrous sodium sulfate. After filtration and concentration under reduced pressure, the residue was purified by silica gel flash chromatography (n-hexane:ethyl acetate=50:50→0:100). The purified product was concentrated under reduced pressure. The residue was then dissolved in ethyl acetate, a 4N hydrogen chloride ethyl acetate solution was added thereto, and the resultant mixture was concentrated under reduced pressure. To the residue was added water (10 ml). After filtration, the filtrate was freeze-dried to obtain 0.91 g of 7-chloro-1-[2-methyl-4-(2-methyl-benzoylamino)-benzoyl]-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl 4-dimethylaminobutyrate hydrochloride as white amorphous solid.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with an aqueous saturated sodium chloride solution
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationAfter filtration and concentration under reduced pressure
  5. customthe residue was purified by silica gel flash chromatography (n-hexane:ethyl acetate=50:50→0:100)
  6. concentrationThe purified product was concentrated under reduced pressure
  7. dissolutionThe residue was then dissolved in ethyl acetate
  8. additiona 4N hydrogen chloride ethyl acetate solution was added
  9. concentrationthe resultant mixture was concentrated under reduced pressure
  10. additionTo the residue was added water (10 ml)
  11. filtrationAfter filtration
  12. customthe filtrate was freeze-dried

Sources & evidence

ORD record
ord-dacc6cd7b9324ffcae3d7fa2010985c4
Source dataset
uspto-grants-2014_07
Patent number
US08785386B2

Reaction notes

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