Dimethyl Sulfoxide → tert-Butyl 4-(2-oxoethyl)piperidine-1-carboxylate

HRID 1862653Notes

Reaction equation

HRID 1862653 reaction equation
C(Cl)(=O)C(Cl)=O.CS(C)=O.[OH:11][CH2:12][CH2:13][CH:14]1[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16][CH2:15]1>C(Cl)Cl>[C:23]([O:22][C:20]([N:17]1[CH2:18][CH2:19][CH:14]([CH2:13][CH:12]=[O:11])[CH2:15][CH2:16]1)=[O:21])([CH3:26])([CH3:25])[CH3:24]

Participants

5

Reactant 3

HCID 679Dimethyl SulfoxideHCID 65578Oxalyl chlorideHCID 8541401-(tert-Butoxycarbonyl)-4-(2-hydroxyethyl)piperidine

Product 1

HCID 10353694tert-Butyl 4-(2-oxoethyl)piperidine-1-carboxylateYield 83.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

A solution of oxalyl chloride (1.23 mL, 14.1 mmol) in methylene chloride (50 mL) was cooled to −78° C. DMSO (2.0 mL, 28.3 mmol), was added slowly via syringe. After 10 min, 4-(2-hydroxyeth-1-yl)-1-t-butoxycarbonylpiperidine (2.7 g, 11.8 mmol) in methylene chloride (15 mL) was added. The cold mixture was stirred for an additional 20 min then TEA (8.2 mL, 59 mmol) was added. The mixture was warmed to rt and stirred for 1.5 h, then diluted with methylene chloride (300 mL). The organic phase was washed with 1M sodium hydroxide, dried over sodium sulfate and concentrated. FC (125 g silica, 2.5/1 hexanes/ethyl acetate) afforded the title compound (2.25 g).

Workup

  1. stirringstirred for 1.5 h
  2. washThe organic phase was washed with 1M sodium hydroxide
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-9dbf0ae15aa14d9a881ba42da041f663
Source dataset
uspto-grants-2003_03
Patent number
US06538002B1

Reaction notes

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