Hydrochloric Acid → 1-acetyl-N-methoxy-N-methylpiperidine-4-carboxamide

HRID 1809549Notes

Reaction equation

HRID 1809549 reaction equation
[C:1]([N:4]1[CH2:9][CH2:8][CH:7]([C:10]([OH:12])=O)[CH2:6][CH2:5]1)(=[O:3])[CH3:2].N1(C(N2C=CN=C2)=O)C=CN=C1.Cl.[CH3:26][O:27][NH:28][CH3:29].Cl>ClCCl.O1CCOCC1>[C:1]([N:4]1[CH2:5][CH2:6][CH:7]([C:10]([N:28]([O:27][CH3:26])[CH3:29])=[O:12])[CH2:8][CH2:9]1)(=[O:3])[CH3:2]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 682631,1'-CarbonyldiimidazoleHCID 81138Methanamine, N-methoxy-, hydrochloride (1:1)HCID 1172551-Acetylpiperidine-4-carboxylic acid

Product 1

HCID 187135481-acetyl-N-methoxy-N-methylpiperidine-4-carboxamideYield 80.72%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 312751,4-DioxaneSolvent

Procedure

To a solution of 1-acetylpiperidine-4-carboxylic acid (58.50 g, 342 mmol) in dichloromethane (700 mL) was added di(1H-imidazol-1-yl)methanone (58.18 g, 359 mmol). After the addition the mixture was agitated for two hours and N-methoxymethanamine hydrochloride (35.00 g, 359 mmol) was added at once. The mixture was agitated overnight at ambient temperature and 4M HCl in dioxane (75 mL) was added slowly. The slurry was agitated for 30 minutes and then filtered. Filtrate was washed twice with sodium bicarbonate solution, dried and concentrated in vacuo to give the title compound (59.10 g, 80.72% yield).

Workup

  1. additionAfter the addition the mixture
  2. stirringThe mixture was agitated overnight at ambient temperature
  3. stirringThe slurry was agitated for 30 minutes
  4. filtrationfiltered
  5. washFiltrate was washed twice with sodium bicarbonate solution
  6. customdried
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-7fa9d85ded364b4ca0fdbd1e2d3a7769
Source dataset
uspto-grants-2013_01
Patent number
US08362037B2

Reaction notes

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