Trifluoroacetic acid → HCID 12108348, compound

HRID 1839186Notes

Reaction equation

HRID 1839186 reaction equation
FC(F)(F)C(O)=O.[C:8]([N:15]1[CH2:20][CH2:19][CH2:18][CH:17]([CH2:21][N:22]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:23](=[O:26])[CH2:24][CH3:25])[CH2:16]1)(OC(C)(C)C)=O.[N:33]1[CH:38]=[CH:37][CH:36]=[C:35](C=O)[CH:34]=1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>C(Cl)Cl>[N:33]1[CH:38]=[CH:37][CH:36]=[C:35]([CH2:8][N:15]2[CH2:20][CH2:19][CH2:18][CH:17]([CH2:21][N:22]([C:27]3[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=3)[C:23](=[O:26])[CH2:24][CH3:25])[CH2:16]2)[CH:34]=1

Participants

6

Reactant 4

HCID 6422Trifluoroacetic acidHCID 103713-PyridinecarboxaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 12991578N-(1-Boc-piperidin-3-ylmethyl)-N-phenyl-propionamide

Product 1

HCID 12108348HCID 12108348, compoundYield 76%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Trifluoroacetic acid (0.5 mL) was added dropwise to a solution of N-(1-Boc-piperidin-3-ylmethyl)-N-phenyl-propionamide 5 (21 mg, 0.061 mmol) in 0.5 mL of dry CH2Cl2 at 0° C. (ice-water). The reaction mixture was stirred at room temperature for 30 minutes. TLC showed the reaction was complete. After removal of the solvents, the residue was dried under vacuum for 3 hrs. The crude compound was dissolved in DMF (0.5 mL) and 3-pyridine carboxaldehyde (8.6 μL, 1.5 eq.) was added. The mixture was stirred at room temperature for 30 min. NaB(OAc)3H (95%, 20.3 mg, 1.5 eq.) was introduced in one portion, and the mixture was shaken at room temperature overnight. The mixture was quenched with 5 mL of aqueous potassium carbonate (sat.), then extracted with ethyl acetate (3×10 mL). The extracts were combined and washed with aqueous NaHCO3 (sat., 2×5 mL), brine (10 mL), and dried over anhydrous sodium sulfate. After the solvent was removed, the remaining oily residue was purified by preparative thin layer chromatography (EtOAc/MeOH, 9:1) to afford N-[1-(Pyridin-3-ylmethyl)-piperidin-3-ylmethyl]-N-phenyl-propionamide 12 as a colorless oil (15.6 mg, 76%). LRMS 338.

Workup

  1. customAfter removal of the solvents
  2. customthe residue was dried under vacuum for 3 hrs
  3. dissolutionThe crude compound was dissolved in DMF (0.5 mL)
  4. stirringThe mixture was stirred at room temperature for 30 min
  5. stirringthe mixture was shaken at room temperature overnight
  6. customThe mixture was quenched with 5 mL of aqueous potassium carbonate (sat.)
  7. extractionextracted with ethyl acetate (3×10 mL)
  8. washwashed with aqueous NaHCO3 (sat., 2×5 mL), brine (10 mL)
  9. dry with materialdried over anhydrous sodium sulfate
  10. customAfter the solvent was removed
  11. customthe remaining oily residue was purified by preparative thin layer chromatography (EtOAc/MeOH, 9:1)

Sources & evidence

ORD record
ord-d4306d801f944195aa9af19c78c61ee5
Source dataset
uspto-grants-2004_01
Patent number
US06677332B1

Reaction notes

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