1-(2-Chlorophenyl)-5,5-dimethylpiperazin-2-one → N-{(S)-2-[4-(2-Chlorophenyl)-2,2-dimethyl-5-oxopiperazin-1-yl]-1-[(2S,4S)-4-isopropyl-5-oxotetrahydrofuran-2-yl]ethyl}-2-nitrobenzenesulfonamide

HRID 1694893Notes

Reaction equation

HRID 1694893 reaction equation
[CH:1]([C@@H:4]1[CH2:8][C@@H:7]([CH:9]2[CH2:11][N@@:10]2[S:12]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=2[N+:21]([O-:23])=[O:22])(=[O:14])=[O:13])[O:6][C:5]1=[O:24])([CH3:3])[CH3:2].[Cl:25][C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=1[N:32]1[CH2:37][C:36]([CH3:39])([CH3:38])[NH:35][CH2:34][C:33]1=[O:40]>C1(C)C=CC=CC=1>[Cl:25][C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=1[N:32]1[C:33](=[O:40])[CH2:34][N:35]([CH2:11][C@H:9]([NH:10][S:12]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=2[N+:21]([O-:23])=[O:22])(=[O:14])=[O:13])[C@@H:7]2[CH2:8][C@@H:4]([CH:1]([CH3:3])[CH3:2])[C:5](=[O:24])[O:6]2)[C:36]([CH3:39])([CH3:38])[CH2:37]1

Participants

4

Reactant 2

HCID 666457101-(2-Chlorophenyl)-5,5-dimethylpiperazin-2-oneHCID 178448140HCID 178448140, compound

Product 1

HCID 66645367N-{(S)-2-[4-(2-Chlorophenyl)-2,2-dimethyl-5-oxopiperazin-1-yl]-1-[(2S,4S)-4-isopropyl-5-oxotetrahydrofuran-2-yl]ethyl}-2-nitrobenzenesulfonamideYield 93.4%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A solution of 192 mg of (3S,5S)-3-isopropyl-5-[(S)-1-(2-nitrobenzenesulfonyl)aziridin-2-yl]dihydrofuran-2-one obtained in Example (1g) (0.54 mmol) and 181 mg of 1-(2-chlorophenyl)-5,5-dimethylpiperazin-2-one obtained in Example (1k) (0.76 mmol) in toluene (7 ml) was stirred at 110° C. for 1.5 hours. After cooling, the reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (elution solvent: methylene chloride/ethyl acetate=5/1) to obtain 299 mg of the title compound (yield: 93%).

Workup

  1. temperatureAfter cooling
  2. concentrationthe reaction mixture was concentrated under reduced pressure
  3. customthe residue was purified by silica gel column chromatography (elution solvent: methylene chloride/ethyl acetate=5/1)

Sources & evidence

ORD record
ord-a4b35c1cc51c4036b559904c63ca82d3
Source dataset
uspto-grants-2012_04
Patent number
US08158790B2

Reaction notes

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