Triethylamine → (+)-(3,5-Dimethylbenzoyl)-3-(3,4-dichlorophenyl)piperazine

HRID 1739693Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1739693
[Cl:1][C:2]1[CH:3]=[C:4]([CH:9]2[CH2:14][NH:13][CH2:12][CH2:11][NH:10]2)[CH:5]=[CH:6][C:7]=1[Cl:8].[CH3:15][C:16]1[CH:17]=[C:18]([CH:22]=[C:23]([CH3:25])[CH:24]=1)[C:19](O)=[O:20].O.ON1C2C=CC=CC=2N=N1.CCN(CC)CC>C(Cl)Cl>[CH3:15][C:16]1[CH:17]=[C:18]([CH:22]=[C:23]([CH3:25])[CH:24]=1)[C:19]([N:13]1[CH2:12][CH2:11][NH:10][CH:9]([C:4]2[CH:5]=[CH:6][C:7]([Cl:8])=[C:2]([Cl:1])[CH:3]=2)[CH2:14]1)=[O:20]

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 103563,5-Dimethylbenzoic acidHCID 27960291-Hydroxybenzotriazole hydrateHCID 42313562-(3,4-Dichlorophenyl)piperazine

Produkt 1

HCID 10292159(+)-(3,5-Dimethylbenzoyl)-3-(3,4-dichlorophenyl)piperazineAusbeute 57,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a cooled solution of CH2Cl2 (600 mL) containing 2-(3,4-dichlorophenyl)piperazine (6.934 g, 30 mmol), 3,5-dimethylbenzoic acid (4.55 g, 30 mmol), and N-hydroxybenzotriazole monohydrate (4.05 g, 30 mmol) at -20° C. were added Et3N (4.2 mL, 30 mmol) and N,N-dimethylaminopropylethylcarbodimide (DEC) (5.86 g, 30 mmol) under nitrogen. The reaction was kept at -20° C. for an hour and gradually warmed to RT overnight. After stirring 22 hours, the reaction was complete and CH2Cl2 (200 mL) was added. The organic solution was washed with brine (150 mL, 3×), dried over MgSO4, filtered and concentrated under vacuum to give 8.2 g of crude product. The product was crystallized from CH2Cl2 /Hexane to give a light yellow solid (6.3 g, 17.34 mmol, 57.8%). Mm.p.139-141° C.; FAB MS [M+1]+35Cl 363.1.

Aufarbeitung

  1. waitThe reaction was kept at -20° C. for an hour
  2. washThe organic solution was washed with brine (150 mL, 3×)
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated under vacuum
  6. customto give 8.2 g of crude product
  7. customThe product was crystallized from CH2Cl2 /Hexane

Quellen und Nachweise

ORD-Eintrag
ord-56f244677fc849b4926270e5ea779790
Quelldatensatz
uspto-grants-1999_10
Patentnummer
US05968929

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