Acetic Acid → 1-Phenyl-N'-phenylmethyl-4-piperidinamine

HRID 443309Notes

Reaction equation

HRID 443309 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.[CH2:14]([NH2:21])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([O-])(O)=O.[Na+]>ClCCCl>[CH2:14]([NH:21][CH:10]1[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)[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1

Participants

7

Reactant 5

HCID 176Acetic AcidHCID 7504BenzylamineHCID 4130091-Phenyl-4-piperidinoneHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydride

Product 1

HCID 211933851-Phenyl-N'-phenylmethyl-4-piperidinamine

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

1-Phenylpiperidin-4-one (2.0 g, 11.4 mmol) (from Example 123) and benzylamine (1.33 g, 12.5 mmol) were dissolved in 1,2-dichloroethane (35 mL) and acetic acid (1.36 g, 22.6 mmol) was added. The mixture was stirred for 2 hrs at room temperature, then cooled to 0° C. (ice-water) and sodium triacetoxyborohydride (3.14 g, 14.8 mmol) was added, then the reaction mixture was stirred at room temperature for 18 hrs. Sat. NaHCO3 (aq) (30 mL) was added, and the organic layer was extracted. The aqueous phase was extracted with dichloromethane (2×50 mL). The combined organic extracts were dried over MgSO4, filtered, and concentrated in vacuo. The residue was chromatographed on silica gel, eluting with hexane--30% ethyl acetate to give the product as a white solid.

Workup

  1. additionwas added
  2. stirringthe reaction mixture was stirred at room temperature for 18 hrs
  3. extractionthe organic layer was extracted
  4. extractionThe aqueous phase was extracted with dichloromethane (2×50 mL)
  5. dry with materialThe combined organic extracts were dried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was chromatographed on silica gel
  9. washeluting with hexane--30% ethyl acetate

Sources & evidence

ORD record
ord-1e2ff287894c41bcb94746ad5f1ed6ad
Source dataset
uspto-grants-1999_04
Patent number
US05891889

Reaction notes

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