Acetic Acid → 1-Sec-butyl-4-(3-methanesulfonyl-phenyl)piperidine

HRID 1070713Notes

Reaction equation

HRID 1070713 reaction equation
Cl.[CH3:2][S:3]([C:6]1[CH:7]=[C:8]([CH:12]2[CH2:17][CH2:16][NH:15][CH2:14][CH2:13]2)[CH:9]=[CH:10][CH:11]=1)(=[O:5])=[O:4].C(O)(=O)C.[CH3:22][C:23](=O)[CH2:24][CH3:25].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[CH:23]([N:15]1[CH2:16][CH2:17][CH:12]([C:8]2[CH:9]=[CH:10][CH:11]=[C:6]([S:3]([CH3:2])(=[O:5])=[O:4])[CH:7]=2)[CH2:13][CH2:14]1)([CH2:24][CH3:25])[CH3:22]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 6569Methyl Ethyl KetoneHCID 5049666Sodium triacetoxyborohydrideHCID 223978414-(3-(Methylsulfonyl)phenyl)piperidine hydrochloride

Product 1

HCID 223978211-Sec-butyl-4-(3-methanesulfonyl-phenyl)piperidine

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

4-(3-methanesulfonyl-phenyl)-piperidine hydrochloride (20 mg), glacial acetic acid (4.4 mg) and 2-butanone (5.1 mg) were mixed in 1,2-dichloroethane (5 mL). Sodium triacetoxyborohydride (23.5 mg) was added to the solution and the reaction mixture was stirred at room temperature under a nitrogen atmosphere for 5 h (G.L.C. analysis indicated a complete reaction). The reaction was quenched with saturated aqueous NaHCO3 and the product was extracted with CH2Cl2. The combined organic phases were dried (MgSO4), filtered, and the solvent was evaporated to afford 1-sec-butyl-4-(3-methanesulfonyl-phenyl)-piperidine as an oily residue. The product was chromatographed on a silica column with CH2Cl2:MeOH (9:1 (v/v)) as eluent. Collection of the fractions containing pure product and evaporation of the solvent afforded pure amine (15 mg, 71%); MS m/z (relative intensity, 70 eV) 295 (M+, 1), 280 (7), 266 (bp), 187 (4), 129 (4).

Workup

  1. customa complete reaction)
  2. customThe reaction was quenched with saturated aqueous NaHCO3
  3. extractionthe product was extracted with CH2Cl2
  4. dry with materialThe combined organic phases were dried (MgSO4)
  5. filtrationfiltered
  6. customthe solvent was evaporated

Sources & evidence

ORD record
ord-2b7f52b8b6234ee78fc505da3fc920a1
Source dataset
uspto-grants-2005_06
Patent number
US06903120B2

Reaction notes

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