5-Bromothiophene-2-sulfonyl chloride → 4-(5-Bromo-2-thiophenesulfonyl)-1-[1-(tert-butoxycarbonyl)piperidin-4-ylmethyl]-2-piperazinone

HRID 1840555Notes

Reaction equation

HRID 1840555 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([CH2:14][N:15]2[CH2:20][CH2:19][NH:18][CH2:17][C:16]2=[O:21])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[Br:22][C:23]1[S:27][C:26]([S:28](Cl)(=[O:30])=[O:29])=[CH:25][CH:24]=1>C(OCC)(=O)C.C(=O)(O)[O-].[Na+]>[Br:22][C:23]1[S:27][C:26]([S:28]([N:18]2[CH2:19][CH2:20][N:15]([CH2:14][CH:11]3[CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[CH2:9][CH2:10]3)[C:16](=[O:21])[CH2:17]2)(=[O:30])=[O:29])=[CH:25][CH:24]=1

Participants

5

Reactant 2

HCID 27339245-Bromothiophene-2-sulfonyl chlorideHCID 234475144-(2-Oxo-piperazin-1-ylmethyl)-piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 234475704-(5-Bromo-2-thiophenesulfonyl)-1-[1-(tert-butoxycarbonyl)piperidin-4-ylmethyl]-2-piperazinoneYield 49%

Reagents, catalysts & solvents 2

HCID 8857Ethyl AcetateSolventHCID 516892Sodium BicarbonateSolvent

Procedure

To a solution of 1-[1-(tert-butoxycarbonyl)piperidin-4-ylmethyl]-2-piperazinone (500 mg) in ethyl acetate (15 ml) and sodium bicarbonate solution (10 ml) was added at 0° C. 5-bromo-2-thiophenesulfonyl chloride (440 mg), and the mixture was stirred at room temperature for 30 minutes. The organic layer was separated, washed with brine, dried and concentrated, and the residue was purified with silica gel column chromatography (hexane:ethyl acetate=2:3) to give colorless solid of the title compound (430 mg).

Workup

  1. customThe organic layer was separated
  2. washwashed with brine
  3. customdried
  4. concentrationconcentrated
  5. customthe residue was purified with silica gel column chromatography (hexane:ethyl acetate=2:3)

Sources & evidence

ORD record
ord-41f11acef9ed43ef87ad9b3f4a2951a0
Source dataset
uspto-grants-2004_01
Patent number
US06680312B2

Reaction notes

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