Diisopropylethylamine → t-Butyl 4-(3-(1-(3-bromophenyl)ethylamino)-4-nitrophenyl)piperazine-1-carboxylate

HRID 1910561

Reaktionsgleichung

Reaktionsgleichung von HRID 1910561
[Br:1][C:2]1[CH:3]=[C:4]([CH:8]([NH:10][C:11]2[CH:16]=[C:15](F)[CH:14]=[CH:13][C:12]=2[N+:18]([O-:20])=[O:19])[CH3:9])[CH:5]=[CH:6][CH:7]=1.[N:21]1([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1.C(N(C(C)C)CC)(C)C>C(#N)C>[Br:1][C:2]1[CH:3]=[C:4]([CH:8]([NH:10][C:11]2[CH:16]=[C:15]([N:24]3[CH2:23][CH2:22][N:21]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:26][CH2:25]3)[CH:14]=[CH:13][C:12]=2[N+:18]([O-:20])=[O:19])[CH3:9])[CH:5]=[CH:6][CH:7]=1

Komponenten

5

Edukt 3

HCID 81531DiisopropylethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 58707271N-(1-(3-bromophenyl)ethyl)-5-fluoro-2-nitrobenzenamine

Produkt 1

HCID 58707273t-Butyl 4-(3-(1-(3-bromophenyl)ethylamino)-4-nitrophenyl)piperazine-1-carboxylateAusbeute 24,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

A mixture of N-(1-(3-bromophenyl)ethyl)-5-fluoro-2-nitrobenzenamine (1.25 g, 3.7 mmol), tert-butyl piperazine-1-carboxylate (0.7 g, 3.7 mmol), diisopropylethylamine (1.0 mL, 5.7 mmol) and acetonitrile (20 mL) was heated at reflux for 18 h, cooled to room temperature and concentrated in vacuo. The residue was dissolved in ethyl acetate; this solution was washed with water, dried over Na2SO4 and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel using 10%-15% ethyl acetate in hexanes as eluent to yield the title compounds as a yellow solid (0.45 g, 24%). 1H NMR (400 MHz, CDCl3): δ 8.72 (d, 1 H), 8.10 (d, 1 H), 7.51 (s, 1 H), 7.40 (m, 1 H), 7.24 (m, 2 H), 6.17 (dd, 1 H), 5.60 (d, 1 H), 4.52 (m, 1 H), 3.48 (m, 4 H), 3.26 (m, 2 H), 3.13 (m, 2 H), 1.63 (d, 3H), 1.44 (s, 9 H). MS (ESI) m/z: Calculated: 504; Observed: 505 (M+H+).

Aufarbeitung

  1. temperaturewas heated
  2. temperatureat reflux for 18 h
  3. concentrationconcentrated in vacuo
  4. dissolutionThe residue was dissolved in ethyl acetate
  5. washthis solution was washed with water
  6. dry with materialdried over Na2SO4
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by flash column chromatography on silica gel using 10%-15% ethyl acetate in hexanes as eluent

Quellen und Nachweise

ORD-Eintrag
ord-b355a491c7a649b48b4f70cf930cf770
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08604021B2

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