Diisopropylethylamine → Tert-butyl 4-(3-(3,5-dimethoxybenzylamino)-4-(2,2,2-trifluoroacetyl)-phenyl)piperazine-1-carboxylate

HRID 1910558Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1910558
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:21]=[C:22]([O:24][CH3:25])[CH:23]=1)[CH2:6][NH:7][C:8]1[CH:13]=[C:12](F)[CH:11]=[CH:10][C:9]=1[C:15](=[O:20])[C:16]([F:19])([F:18])[F:17].[C:26]([N:33]1[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]1)([O:28][C:29]([CH3:32])([CH3:31])[CH3:30])=[O:27].C(N(CC)C(C)C)(C)C>C(#N)C>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:21]=[C:22]([O:24][CH3:25])[CH:23]=1)[CH2:6][NH:7][C:8]1[CH:13]=[C:12]([N:36]2[CH2:35][CH2:34][N:33]([C:26]([O:28][C:29]([CH3:32])([CH3:31])[CH3:30])=[O:27])[CH2:38][CH2:37]2)[CH:11]=[CH:10][C:9]=1[C:15](=[O:20])[C:16]([F:19])([F:18])[F:17]

Komponenten

5

Edukt 3

HCID 81531DiisopropylethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 587072721-(2-(3,5-Dimethoxybenzylamino)-4-fluorophenyl)-2,2,2-trifluoroethanone

Produkt 1

HCID 58707343Tert-butyl 4-(3-(3,5-dimethoxybenzylamino)-4-(2,2,2-trifluoroacetyl)-phenyl)piperazine-1-carboxylateAusbeute 135,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

A solution of 1-(2-(3,5-dimethoxybenzylamino)-4-fluorophenyl)-2,2,2-trifluoroethanone (527 mg, 1.47 mmol), N-Boc-piperazine (296 mg, 1.62 mmol) and N,N-diisopropylethylamine (0.51 mL, 2.94 mmol) in acetonitrile was stirred at reflux for 48 h. The reaction mixture was cooled down and concentrated under reduced pressure. The residue was taken up in dichloromethane, washed with water, dried and concentrated in vacuo to yield 1.04 g of the crude aniline. The crude product was purified by PTLC (20% ethyl acetate in hexanes) to yield 230 mg (30%) of tert-butyl 4-(3-(3,5-dimethoxybenzylamino)-4-(2,2,2-trifluoroacetyl)phenyl)piperazine-1-carboxylate: 1H NMR (400 MHz, CD3OD): δ 9.32 (br t, 1H), 7.63 (dd, 1H), 6.50 (d, 2H), 6.37 (t, 1H), 6.19 (dd, 1H), 5.81 (d, 1H), 4.39 (d, 2H), 3.77 (s, 6H), 3.52-3.49 (m, 4H), 3.35-3.32 (m, 4H), 1.48 (s, 9H). MS (ESI) m/z: Calculated: 523.23; Observed: 546.3 (M++23).

Aufarbeitung

  1. temperatureat reflux for 48 h
  2. temperatureThe reaction mixture was cooled down
  3. concentrationconcentrated under reduced pressure
  4. washwashed with water
  5. customdried
  6. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-8b6e0c3814a64a219cadd459a9032518
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08604021B2

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