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

HRID 2303615Notes

Reaction equation

HRID 2303615 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-e71500e0a8c54d7aa0b1420ef2956b9b
Source dataset
uspto-grants-2002_08
Patent number
US06432981B1

Reaction notes

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