2-Pyrrolidone → 4-(Dimethylamino)benzenesulphonyl-2-pyrrolidinone

HRID 981243Notes

Reaction equation

HRID 981243 reaction equation
[H-].[Na+].[NH:3]1[CH2:7][CH2:6][CH2:5][C:4]1=[O:8].[CH3:9][N:10]([CH3:21])[C:11]1[CH:16]=[CH:15][C:14]([S:17](Cl)(=[O:19])=[O:18])=[CH:13][CH:12]=1>O1CCOCC1>[CH3:9][N:10]([CH3:21])[C:11]1[CH:12]=[CH:13][C:14]([S:17]([N:3]2[CH2:7][CH2:6][CH2:5][C:4]2=[O:8])(=[O:19])=[O:18])=[CH:15][CH:16]=1

Participants

5

Reactant 3

HCID 120252-PyrrolidoneHCID 24758Sodium hydrideHCID 125069434-(Dimethylamino)benzene-1-sulfonyl chloride

Product 1

HCID 100615704-(Dimethylamino)benzenesulphonyl-2-pyrrolidinone

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent2×

Procedure

3.44 g of sodium hydride (at 55-60% in oil) is added to a solution comprising 6.11 g of 2-pyrrolidinone and 200 cm3 of dioxan, with agitation for one hour at ambient temperature. 15.76 cm3 of 4-dimethylaminobenzenesulphonyl chloride [Beritche 43, 3038 (1910)]in solution in 250 cm3 of dioxan is added drop by drop, with agitation for one hour at ambient temperature. The sodium chloride is filtered off on celite, the dioxan is evaporated off under reduced pressure, the residue is crystallized from acetone and 3.90 g of expected product is obtained.

Workup

  1. waitwith agitation for one hour at ambient temperature
  2. filtrationThe sodium chloride is filtered off on celite
  3. customthe dioxan is evaporated off under reduced pressure
  4. customthe residue is crystallized from acetone

Sources & evidence

ORD record
ord-8a2966f0e024476083256e32ffa7630d
Source dataset
uspto-grants-1991_02
Patent number
US04990531

Reaction notes

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