1-(tert-Butoxycarbonyl)-4-piperidinecarboxylic acid → Tert-butyl 4-(hydroxymethyl)piperidine-1-carboxylate

HRID 1357883Notes

Reaction equation

HRID 1357883 reaction equation
[C:1]([N:8]1[CH2:16][CH2:15][CH:11]([C:12](O)=[O:13])[CH2:10][CH2:9]1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2]>C1COCC1>[C:4]([O:3][C:1]([N:8]1[CH2:16][CH2:15][CH:11]([CH2:12][OH:13])[CH2:10][CH2:9]1)=[O:2])([CH3:7])([CH3:6])[CH3:5]

Participants

3

Reactant 1

HCID 3928711-(tert-Butoxycarbonyl)-4-piperidinecarboxylic acid

Product 1

HCID 2764081Tert-butyl 4-(hydroxymethyl)piperidine-1-carboxylateYield 103.4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of 25.03 g (109.2 mmole) N-Boc isonipecotic acid was dissolved in 200 mL THF and treated with 200 mL 1 M borane-tetrahydrofuran complex in THF, and the mixture was stirred overnight. The mixture was concentrated under vacuum, diluted with 750 mL ethyl acetate, and washed with 150 ML 1 N HCl (6×) and then saturated brine. The organic layer was dried over sodium sulfate and concentrated to give 24.3 g of crude product as a white solid. This was used as is in the next step.

Workup

  1. concentrationThe mixture was concentrated under vacuum
  2. additiondiluted with 750 mL ethyl acetate
  3. washwashed with 150 ML 1 N HCl (6×)
  4. dry with materialThe organic layer was dried over sodium sulfate
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-918c48ceaf31483498bb1a29e901654b
Source dataset
uspto-grants-2003_07
Patent number
US06593346B2

Reaction notes

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