Acetic Acid → 1-Butyl-4-[4-methoxy-2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine

HRID 2218861Notes

Reaction equation

HRID 2218861 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([N:9]2[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]2)=[C:5]([CH:15]2[CH2:20][C:19]([CH3:22])([CH3:21])[CH2:18][C:17]([CH3:24])([CH3:23])[CH2:16]2)[CH:4]=1.[CH:25](=O)[CH2:26][CH2:27][CH3:28].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(O)(=O)C.C(=O)([O-])O.[Na+]>O1CCCC1.C(OCC)(=O)C>[CH2:25]([N:12]1[CH2:13][CH2:14][N:9]([C:6]2[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[CH:4][C:5]=2[CH:15]2[CH2:20][C:19]([CH3:22])([CH3:21])[CH2:18][C:17]([CH3:24])([CH3:23])[CH2:16]2)[CH2:10][CH2:11]1)[CH2:26][CH2:27][CH3:28]

Participants

8

Reactant 5

HCID 176Acetic AcidHCID 261ButanalHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 231427891-[4-Methoxy-2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine

Product 1

HCID 231426591-Butyl-4-[4-methoxy-2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 1-[4-methoxy-2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine (10 mg, 0.030 mmol) produced in Example (85c) in tetrahydrofuran (1 mL) were added butyraldehyde (3.3 mg, 0.045 mmol), sodium triacetoxyborohydride (13 mg, 0.061 mmol) and acetic acid (1.8 mg, 0.030 mmol) in that order, followed by stirring for 60 minutes at room temperature. Saturated aqueous solution of sodium hydrogencarbonate was added to the reaction mixture, extraction was performed with ethyl acetate, and the organic layer was concentrated. The resultant residue was purified by NH silica gel column chromatography (ethyl acetate/heptane) to give 1-butyl-4-[4-methoxy-2-(3,3,5,5-tetramethylcyclohexyl)phenyl]piperazine.

Workup

  1. concentrationthe organic layer was concentrated
  2. customThe resultant residue was purified by NH silica gel column chromatography (ethyl acetate/heptane)

Sources & evidence

ORD record
ord-7ab9cba7294c4c4a99dffd37e7033471
Source dataset
uspto-grants-2008_08
Patent number
US07410971B2

Reaction notes

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