Potassium Carbonate → Methyl 5-(2-methoxyethoxy)-2-nitrobenzoate

HRID 871317ノート

反応式

HRID 871317 の反応式
[OH:1][C:2]1[CH:3]=[CH:4][C:5]([N+:12]([O-:14])=[O:13])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8].C(=O)([O-])[O-].[K+].[K+].Br[CH2:22][CH2:23][O:24][CH3:25]>CN(C=O)C.O>[CH3:25][O:24][CH2:23][CH2:22][O:1][C:2]1[CH:3]=[CH:4][C:5]([N+:12]([O-:14])=[O:13])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8]

参加物

6

反応物 3

HCID 11430Potassium CarbonateHCID 809722-Bromoethyl methyl etherHCID 12922678Methyl 5-hydroxy-2-nitrobenzoate

生成物 1

HCID 66639151Methyl 5-(2-methoxyethoxy)-2-nitrobenzoate収率 77%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒

反応条件

温度
60 °C

実験手順

To methyl 5-hydroxy-2-nitrobenzoate (1.08 g, 5.5 mmol) in DMF (50 mL) was added potassium carbonate (1.52 g, 11 mmol) followed by 1-bromo-2-methoxyethane (1.55 mL, 16.4 mmol) and the mixture heated at 60° C. overnight. After cooling to room temperature, the reaction was diluted with H2O, extracted with EtOAc, and the organic layer washed with H2O and brine, dried over MgSO4, filtered, concentrated in vacuo, and purified by column chromatography (12-100% EtOAc/hexanes) to give methyl 5-(2-methoxyethoxy)-2-nitrobenzoate (1.08 g, 4.2 mmol, 77%). 1H NMR (300 MHz, DMSO-d6) δ 8.13 (d, 1H), 7.31 (s, 1H), 7.29 (d, 1H), 4.29 (dd, 2H), 3.86 (s, 3H), 3.68 (dd, 2H), 3.31 (s, 3H); LC-MS (ESI) m/z 256 (M+H)+.

後処理

  1. temperatureAfter cooling to room temperature
  2. extractionextracted with EtOAc
  3. washthe organic layer washed with H2O and brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. custompurified by column chromatography (12-100% EtOAc/hexanes)

出典と根拠

ORDレコード
ord-a09f2adf1d874fe385db8b04fa616e14
出典データセット
uspto-grants-2015_03
特許番号
US08969587B2

反応ノート

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