HCID 18919859, compound → HCID 18919749, compound

HRID 1291161Notes

Reaction equation

HRID 1291161 reaction equation
[CH3:1][C:2]1[CH:26]=[CH:25][C:5]([C:6]([O:8][CH:9]2[CH2:14][CH2:13][N:12]([CH2:15][C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=3[N+:22]([O-])=O)[CH2:11][CH2:10]2)=[O:7])=[CH:4][CH:3]=1>C(O)C.[Ni]>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([C:6]([O:8][CH:9]2[CH2:10][CH2:11][N:12]([CH2:15][C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=3[NH2:22])[CH2:13][CH2:14]2)=[O:7])=[CH:25][CH:26]=1

Participants

4

Reactant 1

HCID 18919859HCID 18919859, compound

Product 1

HCID 18919749HCID 18919749, compoundYield 86.3%

Reagents, catalysts & solvents 2

HCID 935NickelCatalystHCID 702EthanolSolvent

Procedure

0.32 g (0.0009 mol) of 1-(2-nitro-benzyl)-piperidin-4-yl 4-methyl-benzoate was dissolved in 18 ml of ethanol and treated with 0.192 g of Raney-nickel. The mixture was hydrogenated at room temperature and under normal pressure for 2 hrs. The catalyst was filtered off and, after concentration, the residue was chromatographed on silica gel with ethyl acetate/hexane (1:4) as the eluent. 0.252 g (86%) of 1-(2-amino-benzyl)-piperidin-4-yl 4-methyl-benzoate was obtained as yellowish crystals; m.p. 123°-1250°.

Workup

  1. filtrationThe catalyst was filtered off
  2. concentrationafter concentration
  3. customthe residue was chromatographed on silica gel with ethyl acetate/hexane (1:4) as the eluent

Sources & evidence

ORD record
ord-02c64287b8c74d4fba34e45d7525ce32
Source dataset
uspto-grants-1998_05
Patent number
US05753679

Reaction notes

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