Methanol → Tert-butyl 4-((4'-chlorobiphenyl-2-yl)methyl)piperazine-1-carboxylate

HRID 624327Notes

Reaction equation

HRID 624327 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]([CH:14]=O)=[CH:10][CH:11]=[CH:12][CH:13]=2)=[CH:4][CH:3]=1.[N:16]1([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH2:21][CH2:20][NH:19][CH2:18][CH2:17]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].CO>C(Cl)Cl.CCOCC>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=2[CH2:14][N:19]2[CH2:18][CH2:17][N:16]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH2:21][CH2:20]2)=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 887MethanolHCID 143452tert-Butyl piperazine-1-carboxylateHCID 13936894'-Chlorobiphenyl-2-carbaldehydeHCID 5049666Sodium triacetoxyborohydride

Product 1

HCID 22662065Tert-butyl 4-((4'-chlorobiphenyl-2-yl)methyl)piperazine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

4′-Chlorobiphenyl-2-carboxaldehyde (4.1 g), tert-butyl piperazine-1-carboxylate (4.23 g) and sodium triacetoxyborohydride (5.61 g) in CH2Cl2 (60 mL) were stirred for 24 hours. The mixture was treated with methanol and poured into ether. The extract was washed with water and brine and concentrated. The concentrate was chromatographed on silica gel with 2-25% ethyl acetate/hexanes.

Workup

  1. washThe extract was washed with water and brine
  2. concentrationconcentrated
  3. customThe concentrate was chromatographed on silica gel with 2-25% ethyl acetate/hexanes

Sources & evidence

ORD record
ord-204fff4db1f645d7875ff750d7ee1235
Source dataset
uspto-grants-2016_04
Patent number
US09303025B2

Reaction notes

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