6-(2,6-Dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthalene → 6-(5-Bromo-2,6-dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthalene

HRID 488824

反応式

HRID 488824 の反応式
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[C:5]([O:9][CH3:10])[C:4]=1[C:11]1[CH:12]=[C:13]2[C:18](=[CH:19][CH:20]=1)[C:17]([CH3:22])([CH3:21])[CH2:16][CH2:15][C:14]2([CH3:24])[CH3:23].[Br-:25].[Br-].[Br-].[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1>ClCCl.C(OCC)(=O)C>[Br:25][C:6]1[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[C:4]([C:11]2[CH:12]=[C:13]3[C:18](=[CH:19][CH:20]=2)[C:17]([CH3:22])([CH3:21])[CH2:16][CH2:15][C:14]3([CH3:24])[CH3:23])[C:5]=1[O:9][CH3:10]

参加物

5

反応物 2

HCID 211069166-(2,6-Dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthaleneHCID 21124087Pyridiniumtribromide

生成物 1

HCID 694617116-(5-Bromo-2,6-dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthalene収率 57%

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 8857Ethyl Acetate溶媒

実験手順

To a solution of 6-(2,6-dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthlene (340 mg, 1.05 mmol) in dichloromethane (10 mL) was added pyridinium tribromide (335 mg, 1.05 mmol) and the reaction mixture stirred at room temperature overnight. The solution was diluted with ethyl acetate and washed successively with water and brine, dried over anhydrous magnesium sulfate, filtered and evaporated. The residue was purified on silica gel (eluent: ethyl acetate/hexane, 0.5:9.5) to give 0.24 g (57%) of 6-(5-bromo-2,6-dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthlene. 1H NMR (500 MHz; CDCl3): δ 1.28 (s, 6 H); 1.31 (s, 6 H); 1.70 (s, 4 H); 3.35 (s, 3 H); 3.73 (s, 3 H); 7.14 (dd, J1=1.5 Hz, J2 =8.5 Hz, 1 H); 7.15 (dd, J1=2.0 Hz, J2=8.5 Hz, 1H); 7.30 (d, J=8.0 Hz, 1H); 7.36 (d, J=1.5 Hz, 1H); 7.45 (d, J=8.0 Hz, 1 H), 7.95 (br, 1 H).

後処理

  1. washwashed successively with water and brine
  2. dry with materialdried over anhydrous magnesium sulfate
  3. filtrationfiltered
  4. customevaporated
  5. customThe residue was purified on silica gel (eluent: ethyl acetate/hexane, 0.5:9.5)

出典と根拠

ORDレコード
ord-303b9b64709b49fda5ee53091ed1767b
出典データセット
uspto-grants-2005_12
特許番号
US06974826B2

関連ノート

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