4-tert-Butylphenol → Ethyl 2-(4-tert-butylphenoxy)propanoate

HRID 585203ノート

反応式

HRID 585203 の反応式
[C:1]([C:5]1[CH:10]=[CH:9][C:8]([OH:11])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].Br[CH:15]([CH3:21])[C:16]([O:18][CH2:19][CH3:20])=[O:17]>CN(C=O)C.C(OCC)(=O)C>[CH2:19]([O:18][C:16](=[O:17])[CH:15]([O:11][C:8]1[CH:7]=[CH:6][C:5]([C:1]([CH3:4])([CH3:2])[CH3:3])=[CH:10][CH:9]=1)[CH3:21])[CH3:20]

参加物

6

反応物 3

HCID 73934-tert-ButylphenolHCID 24758Sodium hydrideHCID 79040Ethyl 2-bromopropionate

生成物 1

HCID 3023318Ethyl 2-(4-tert-butylphenoxy)propanoate収率 100%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒HCID 8857Ethyl Acetate溶媒

実験手順

4-t-Butylphenol (7.52 g, 50 mmol) in anhydrous DMF (40 mL) was added dropwise to NaH (2.2 g, 55 mmol, 60% w/w in mineral oil) at 0° C. under an atmosphere of nitrogen. After five min, ethyl 2-bromopropionate (6.49 mL, 50 mmol, d=1.394) was added rapidly dropwise and the resultant mixture was allowed to stir for 18 h, gradually warming to ambient temperature. The reaction mixture was diluted with ethyl acetate (300 mL) and extracted twice with water and once with brine. The organic layer was dried over Na2SO4 and concentrated in vacuo to produce a colorless oil (12.5 g, 100%) 1H NMR (300 MHz, CDCl3): δ 7.28 (d, 2H, J=5.5), 6.80 (d, 2H, J=5.5), 4.70 (q, 1H, J=6.6), 4.22 (q, 2H, J=7.1), 1.59 (d, 3H, J=6.6), 1.28 (s, 9H), 1.25 (t, 3H, J=7.1). MS [EI+] 251 (M+H)+, 268 (M+NH4)+.

後処理

  1. extractionextracted twice with water and once with brine
  2. dry with materialThe organic layer was dried over Na2SO4
  3. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-846ed0d77c724c54bc59be8007b69f9a
出典データセット
uspto-grants-2005_08
特許番号
US06930120B2

反応ノート

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