Acetic Acid → 1-Isopropyl-4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine

HRID 2247192Notes

Reaction equation

HRID 2247192 reaction equation
[N+:1]([C:4]1[CH:5]=[CH:6][C:7]([C:18]([F:24])([F:23])[C:19]([F:22])([F:21])[F:20])=[C:8]([CH:17]=1)[O:9][CH2:10][CH:11]1[CH2:16][CH2:15][NH:14][CH2:13][CH2:12]1)([O-:3])=[O:2].[CH3:25][C:26]([CH3:28])=O.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C(O)(=O)C>ClCCCl>[CH:26]([N:14]1[CH2:15][CH2:16][CH:11]([CH2:10][O:9][C:8]2[CH:17]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=[CH:6][C:7]=2[C:18]([F:24])([F:23])[C:19]([F:20])([F:21])[F:22])[CH2:12][CH2:13]1)([CH3:28])[CH3:25]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 180Acetone2×HCID 5049666Sodium triacetoxyborohydrideHCID 219593894-(3-Nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine

Product 1

HCID 219594781-Isopropyl-4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

Dissolved 4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine (646 mg) in 1,2-dichloroethane (6.4 ml), then added acetone (136 ul), NaBH(OAc)3 (541 mg) and finally acetic acid (105 ul). Stirred the cloudy yellow solution under N2 at RT overnight. Added another 130 uL acetone and stirred at RT over weekend. Quenched the reaction with 30 mL N NaOH/H2O and stirred 10 min. Extracted with Et2O and the organic layer was brine-washed, dried over Na2SO4, filtered and concentrated in vacuo. Dried under high vacuum for several h to obtain 1-isopropyl-4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine as a yellow orange solid.

Workup

  1. stirringstirred at RT over weekend
  2. customQuenched
  3. customthe reaction with 30 mL N NaOH/H2O
  4. stirringstirred 10 min
  5. extractionExtracted with Et2O
  6. washwashed
  7. dry with materialdried over Na2SO4
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo
  10. customDried under high vacuum for several h

Sources & evidence

ORD record
ord-cd1a4b1ebbb44e08944cee34b6f60563
Source dataset
uspto-grants-2010_03
Patent number
US07687643B2

Reaction notes

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