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

HRID 2426003

反応式

HRID 2426003 の反応式
[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

参加物

5

反応物 3

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

生成物 1

HCID 58707273t-Butyl 4-(3-(1-(3-bromophenyl)ethylamino)-4-nitrophenyl)piperazine-1-carboxylate収率 24.1%

試薬・触媒・溶媒 1

HCID 6342Acetonitrile溶媒

実験手順

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, 1H), 7.51 (s, 1H), 7.40 (m, 1H), 7.24 (m, 2H), 6.17 (dd, 1H), 5.60 (d, 1H), 4.52 (m, 1H), 3.48 (m, 4H), 3.26 (m, 2H), 3.13 (m, 2H), 1.63 (d, 3H), 1.44 (s, 9H). MS (ESI) m/z: Calculated: 504; Observed: 505 (M+H+).

後処理

  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

出典と根拠

ORDレコード
ord-35a9035c16fd4913be514fdf979d8d0f
出典データセット
uspto-grants-2011_06
特許番号
US07968538B2

関連ノート

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