Hydrochloric Acid → Ethyl cis(+/-)-(2E)-4-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-4-oxo-2-butenoate

HRID 1425222Notes

Reaction equation

HRID 1425222 reaction equation
[Cl:1][C:2]1[N:3]=[C:4]([C:9]([NH:11][C@H:12]2[CH2:17][CH2:16][N:15]([C:18]([O:20]C(C)(C)C)=O)[CH2:14][C@H:13]2[O:25][CH3:26])=[O:10])[NH:5][C:6]=1[CH2:7][CH3:8].Cl.C(OCC)(=O)C.[CH2:34]([O:36][C:37](=[O:43])/[CH:38]=[CH:39]/C(O)=O)[CH3:35].CCN=C=NCCCN(C)C.Cl.Cl>CO.CN(C1C=CN=CC=1)C>[Cl:1][C:2]1[N:3]=[C:4]([C:9]([NH:11][C@H:12]2[CH2:17][CH2:16][N:15]([C:18](=[O:20])/[CH:39]=[CH:38]/[C:37]([O:36][CH2:34][CH3:35])=[O:43])[CH2:14][C@H:13]2[O:25][CH3:26])=[O:10])[NH:5][C:6]=1[CH2:7][CH3:8]

Participants

8

Reactant 5

HCID 313Hydrochloric AcidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 5358902Monoethyl fumarateHCID 21866389Hydrogen chloride-ethyl acetateHCID 86648452tert-Butyl cis(+/-)-4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidine-1-carboxylate

Product 1

HCID 86648693Ethyl cis(+/-)-(2E)-4-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-4-oxo-2-butenoateYield 104.9%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 887MethanolSolvent

Conditions

Temperature
70 °C

Procedure

tert-Butyl cis(±)-4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidine-1-carboxylate obtained by the method described in Example (1g) (133 mg, 0.34 mmol) was dissolved in methanol (2 mL). A 4 N hydrochloric acid/ethyl acetate solution (4 mL) was added, and the mixture was stirred at 70° C. for 30 minutes. Following concentration under reduced pressure, the residue was dissolved in DMA (5 mL). Fumaric acid monoethyl ester (54.42 mg, 0.38 mmol), WSC hydrochloride (197.41 mg, 1.03 mmol) and DMAP (41.94 mg, 0.34 mmol) were added, and the mixture was stirred at room temperature overnight. Dilute hydrochloric acid was added to the reaction solution, followed by extraction with ethyl acetate. Then, the organic layer was washed with brine and dried over anhydrous sodium sulfate. Following concentration under reduced pressure, the residue was purified by silica gel column chromatography (elution solvent: dichloromethane/methanol=40/1, 20/1, 10/1) to obtain 147.3 mg of the title compound as a solid (100%).

Workup

  1. concentrationconcentration under reduced pressure
  2. dissolutionthe residue was dissolved in DMA (5 mL)
  3. stirringthe mixture was stirred at room temperature overnight
  4. extractionfollowed by extraction with ethyl acetate
  5. washThen, the organic layer was washed with brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentration under reduced pressure
  8. customthe residue was purified by silica gel column chromatography (elution solvent: dichloromethane/methanol=40/1, 20/1, 10/1)

Sources & evidence

ORD record
ord-fa4e3d7714ae4f438e22d2083c015633
Source dataset
uspto-grants-2015_01
Patent number
US08927588B2

Reaction notes

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