Sodium Cyanide → 4-Amino-4-cyano-1-phenyl-piperidine

HRID 353943Notes

Reaction equation

HRID 353943 reaction equation
[C:1]1([N:7]2[CH2:12][CH2:11][C:10](=O)[CH2:9][CH2:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C-:14]#[N:15].[Na+].[NH4+:17].[Cl-].N.CO>N.CO>[NH2:17][C:10]1([C:14]#[N:15])[CH2:11][CH2:12][N:7]([C:1]2[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=2)[CH2:8][CH2:9]1

Participants

7

Reactant 4

HCID 8929Sodium CyanideHCID 25517Ammonium ChlorideHCID 4130091-Phenyl-4-piperidinoneHCID 21705897Ammonia methanol

Product 1

HCID 220633514-Amino-4-cyano-1-phenyl-piperidineYield 73.4%

Reagents, catalysts & solvents 2

HCID 222AmmoniaSolventHCID 887MethanolSolvent

Procedure

N-Phenyl-4-piperidone (2.3 g, 13 mmol, 1.0 equiv) was dissolved in 26 mL of 2 M NH3 in MeOH and NaCN (0.76 g, 15 mmol, 1.2 equiv) and NH4Cl (0.80 g, 15 mmol, 1.2 equiv) were added and the mixture was refluxed for 2 h at which time an additional 26 mL of 2 M NH3/MeOH was added followed by another 2 h of reflux. The reaction mixture was cooled and filtered. The filtrate was concentrated. The crude product was purified by flash chromatography on SiO2 eluting with 100% CH2Cl2 and 2% MeOH in CH2Cl2 to give the pure product (1.92 g) as a thick yellow oil which solidified on standing; MS, m/z 202=M+1.

Workup

  1. additionwas added
  2. temperatureof reflux
  3. temperatureThe reaction mixture was cooled
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated
  6. customThe crude product was purified by flash chromatography on SiO2 eluting with 100% CH2Cl2 and 2% MeOH in CH2Cl2

Sources & evidence

ORD record
ord-fc01bf467fd845b88fa2f93561b07817
Source dataset
uspto-grants-2004_06
Patent number
US06756372B2

Reaction notes

Loading…