Triethylamine → 4-(4-Trifluoromethoxy-benzenesulfonyl)-piperazine-1-carboxylic acid tert-butyl ester

HRID 506861Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 506861
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CCN(CC)CC.[F:21][C:22]([F:35])([F:34])[O:23][C:24]1[CH:29]=[CH:28][C:27]([S:30](Cl)(=[O:32])=[O:31])=[CH:26][CH:25]=1>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([S:30]([C:27]2[CH:26]=[CH:25][C:24]([O:23][C:22]([F:21])([F:34])[F:35])=[CH:29][CH:28]=2)(=[O:32])=[O:31])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 523102p-(Trifluoromethoxy)benzenesulphonyl chloride

Produkt 1

HCID 458629304-(4-Trifluoromethoxy-benzenesulfonyl)-piperazine-1-carboxylic acid tert-butyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a solution of piperazine-1-carboxylic acid tert-butyl ester (521 mg, 2.8 mmol) in DCM (6 ml) was added NEt3 (547 μl, 3.92 mmol, 1.4 eq.) and 4-trifluoromethoxy-benzenesulfonyl chloride (880 mg, 3.36 mmol, 1.2 eq.). The reaction mixture was stirred at room temperature for 12 hrs. The excess of sulfonyl chloride was quenched by addition of trisamine resin (150 mg), and subsequent stirring for 2 hrs. The resin was then filtered off, and NaHCO3 sat (5 ml) was added. Filtration of the resulting mixture through hydrophobic catridge and subsequent removal of the solvent under reduced pressure afforded the desired 4-(4-trifluoromethoxy-benzenesulfonyl)-piperazine-1-carboxylic acid tert-butyl ester in quantitative yield.

Aufarbeitung

  1. customThe excess of sulfonyl chloride was quenched by addition of trisamine resin (150 mg)
  2. stirringsubsequent stirring for 2 hrs
  3. filtrationThe resin was then filtered off
  4. additionwas added
  5. filtrationFiltration of the resulting mixture
  6. customthrough hydrophobic catridge and subsequent removal of the solvent under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-1093c867f8d84d4886622b90325daad4
Quelldatensatz
uspto-grants-2010_08
Patentnummer
US07786121B2

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