Trifluoroacetic acid → Benzyl 2-phenylpiperazine-1-carboxylate

HRID 473817Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 473817
[C:1]1([CH:7]2[CH2:12][N:11](C(OC(C)(C)C)=O)[CH2:10][CH2:9][N:8]2[C:20]([O:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)=[O:21])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.FC(F)(F)C(O)=O>ClCCl>[C:1]1([CH:7]2[CH2:12][NH:11][CH2:10][CH2:9][N:8]2[C:20]([O:22][CH2:23][C:24]2[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=2)=[O:21])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Komponenten

4

Edukt 2

HCID 6422Trifluoroacetic acidHCID 675145701-Benzyl 4-tert-butyl 2-phenylpiperazine-1,4-dicarboxylate

Produkt 1

HCID 16740571Benzyl 2-phenylpiperazine-1-carboxylateAusbeute 94 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Reaktionsbedingungen

Temperatur
25 °C

Versuchsvorschrift

To 1-benzyl 4-tert-butyl 2-phenylpiperazine-1,4-dicarboxylate (0.84 g, 2.12 mmol) in dichloromethane (5.0 mL) added drop wise trifluoroacetic acid (5.0 mL) and maintained at 25° C. for 90 minutes. The reaction mixture was concentrated, and the residue dissolved in ethyl acetate (60 mL). The solution was washed with saturated aqueous sodium carbonate (30 mL) and brine (20 mL), and then dried over anhydrous sodium sulfate, filtered and concentrated to yield benzyl 2-phenylpiperazine-1-carboxylate (0.59 g, 94% yield). MS (EI) for C18H20N2O2: 297 (MH+).

Aufarbeitung

  1. concentrationThe reaction mixture was concentrated
  2. dissolutionthe residue dissolved in ethyl acetate (60 mL)
  3. washThe solution was washed with saturated aqueous sodium carbonate (30 mL) and brine (20 mL)
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-08fe7b18c6e1455295f2ab95a09a6593
Quelldatensatz
uspto-grants-2014_01
Patentnummer
US08637499B2

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