Ammonium formate → (S)-3-Methyl-3-[2-(tetrahydropyran-2-yloxy)ethoxymethyl]piperidine

HRID 2407315Notes

Reaction equation

HRID 2407315 reaction equation
C([N:8]1[CH2:13][CH2:12][CH2:11][C@:10]([CH3:25])([CH2:14][O:15][CH2:16][CH2:17][O:18][CH:19]2[CH2:24][CH2:23][CH2:22][CH2:21][O:20]2)[CH2:9]1)C1C=CC=CC=1.C([O-])=O.[NH4+]>CO.[Pd]>[CH3:25][C@:10]1([CH2:14][O:15][CH2:16][CH2:17][O:18][CH:19]2[CH2:24][CH2:23][CH2:22][CH2:21][O:20]2)[CH2:11][CH2:12][CH2:13][NH:8][CH2:9]1

Participants

5

Reactant 2

HCID 2723923Ammonium formateHCID 66727401(S)-1-Benzyl-3-methyl-3-[2-(tetrahydropyran-2-yloxy)ethoxymethyl]piperidine

Product 1

HCID 66727215(S)-3-Methyl-3-[2-(tetrahydropyran-2-yloxy)ethoxymethyl]piperidineYield 83.6%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent2×

Procedure

(S)-1-Benzyl-3-methyl-3-[2-(tetrahydropyran-2-yloxy)ethoxymethyl]piperidine (1.14 g, 3.3 mmol) in MeOH (11 ml) was added to a suspension of Pd/C (0.23 g) in MeOH (11 ml), followed by ammonium formate (1.03 g, 16.4 mmol). The mixture was refluxed for 2 h, after which it was cooled and filtered through Celite. The catalyst was washed with DCM and the combined organic phases were evaporated to dryness. To the residue was added brine (15 ml) and the solution was extracted with EtOAc (3×30 ml). The extracts were combined, dried, filtered and evaporated to yield 0.71 g of the debenzylated product.

Workup

  1. temperatureThe mixture was refluxed for 2 h
  2. temperatureafter which it was cooled
  3. filtrationfiltered through Celite
  4. washThe catalyst was washed with DCM
  5. customthe combined organic phases were evaporated to dryness
  6. additionTo the residue was added brine (15 ml)
  7. extractionthe solution was extracted with EtOAc (3×30 ml)
  8. customdried
  9. filtrationfiltered
  10. customevaporated

Sources & evidence

ORD record
ord-5eda3c4add934034837177a7c9dda0a9
Source dataset
uspto-grants-2014_08
Patent number
US08809536B2

Reaction notes

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