tert-Butyl 4-oxopiperidine-1-carboxylate → tert-butyl 3-[(dimethylamino)methylene]-4-oxotetrahydro-1(2H)-pyridinecarboxylate

HRID 1177726Notes

Reaction equation

HRID 1177726 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11](=[O:14])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]>COC(OC)N(C)C>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][C:11](=[O:14])[C:12](=[CH:6][N:8]([CH3:13])[CH3:9])[CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

3

Reactant 1

HCID 735900tert-Butyl 4-oxopiperidine-1-carboxylate

Product 1

HCID 53395404tert-butyl 3-[(dimethylamino)methylene]-4-oxotetrahydro-1(2H)-pyridinecarboxylate

Reagents, catalysts & solvents 1

HCID 78373Dimethylformamide dimethyl acetalSolvent

Procedure

4-Oxo-piperidine-1-carboxylic acid tert-butyl ester (10 g, 50 mmol) was dissolved in dimethyl formamide dimethylacetal (50 mL) and heated to reflux for 1.25 h. The solution was cooled, concentrated, and purified by flash chromatography to give 2.55 g (19%). Mass spec.: 255.16 (MH)+.

Workup

  1. temperatureheated
  2. temperatureto reflux for 1.25 h
  3. temperatureThe solution was cooled
  4. concentrationconcentrated
  5. custompurified by flash chromatography
  6. customto give 2.55 g (19%)

Sources & evidence

ORD record
ord-b0836ae4ed5e4a588f5279cf97d4f3cc
Source dataset
uspto-grants-2010_11
Patent number
US07842808B2

Reaction notes

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