Water → tert-butyl (2R)-2-(hydroxymethyl)piperidine-1-carboxylate

HRID 749991Notes

Reaction equation

HRID 749991 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH2:11][CH2:10][C@@H:9]1[C:14](O)=[O:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].B.O1CCCC1.O>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH2:11][CH2:10][C@@H:9]1[CH2:14][OH:15])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 962WaterHCID 688618(2R)-1-[(tert-butoxy)carbonyl]piperidine-2-carboxylic acidHCID 2723981Borane;tetrahydrofuran

Product 1

HCID 6933953tert-butyl (2R)-2-(hydroxymethyl)piperidine-1-carboxylateYield 99.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
2.5 °C

Procedure

To a solution of (R)-Piperidine-1,2-dicarboxylic acid 1-tert-butyl ester (5 g, 21.8 mmol) in anhydrous THF (32 mL) at 0-5° C. was added borane-tetrahydrofuran complex (1M solution in THF) (3.6 g, 41.84 mmol) over a period of 15 min. The mixture was stirred at 0-5° C. for 2 h and then at rt for 2 h. The mixture was added over a period of 10 min to cold water (75 mL) and extracted with EtOAc (300 mL). The aqueous layer was re-extracted with EtOAc (2×150 mL). The organic layers were combined, dried over anhydrous Na2SO4 and concentrated to obtain the title product as a colorless oil (4.65 g., 99%).

Workup

  1. waitat rt for 2 h
  2. extractionextracted with EtOAc (300 mL)
  3. extractionThe aqueous layer was re-extracted with EtOAc (2×150 mL)
  4. dry with materialdried over anhydrous Na2SO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-b87738e6685748d0a0f579470ae564d5
Source dataset
uspto-grants-2008_07
Patent number
US07402684B2

Reaction notes

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