Hydrochloric Acid → 1-[2-(4-aminopiperidin-1-yl)ethyl]-7-methoxyquinolin-2(1H)-one

HRID 1644280Notes

Reaction equation

HRID 1644280 reaction equation
C(OC(=O)[NH:7][CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][N:16]2[C:25]3[C:20](=[CH:21][CH:22]=[C:23]([O:26][CH3:27])[CH:24]=3)[CH:19]=[CH:18][C:17]2=[O:28])[CH2:10][CH2:9]1)(C)(C)C.Cl>O1CCOCC1>[NH2:7][CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][N:16]2[C:25]3[C:20](=[CH:21][CH:22]=[C:23]([O:26][CH3:27])[CH:24]=3)[CH:19]=[CH:18][C:17]2=[O:28])[CH2:10][CH2:9]1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 59371209tert-butyl {1-[2-(7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl]piperidin-4-yl}carbamate2×

Product 1

HCID 593982891-[2-(4-aminopiperidin-1-yl)ethyl]-7-methoxyquinolin-2(1H)-oneYield 101.3%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent2×

Procedure

A solution of tert-butyl{1-[2-(7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl]piperidin-4-yl}carbamate (Intermediate 2, 150 mg, 0.37 mmol) in dioxane (4 mL) was treated at room temperature under vigorous stirring with a solution of HCl in dioxane (4M, 2 mL). After 18 hours, the reaction mixture was concentrated under reduced pressure. The residue was taken up in dichloromethane (60 mL) and saturated aqueous sodium hydrogen carbonate solution (10 mL). The aqueous phase was extracted three times with dichloromethane (3×50 mL) and the combined organic phases were dried over sodium sulfate and concentrated under reduced pressure to give 113 mg (100% yield) of the crude product as an oil.

Workup

  1. concentrationthe reaction mixture was concentrated under reduced pressure
  2. extractionThe aqueous phase was extracted three times with dichloromethane (3×50 mL)
  3. dry with materialthe combined organic phases were dried over sodium sulfate
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-c20166de365a436cb5595b7972ddd7d1
Source dataset
uspto-grants-2012_02
Patent number
US08124602B2

Reaction notes

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