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Hydrochloric Acid → (3-Bromo-4-methylphenyl)methanol

HRID 14972
ノート
印刷プレビュー

反応式

HRID 14972 の反応式
[Br:1][C:2]1[CH:3]=[C:4]([CH:10]=[CH:11][C:12]=1[CH3:13])[C:5](OCC)=[O:6].[H-].[Al+3].[Li+].[H-].[H-].[H-].CCOCC.Cl>C1COCC1>[Br:1][C:2]1[CH:3]=[C:4]([CH2:5][OH:6])[CH:10]=[CH:11][C:12]=1[CH3:13]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 313Hydrochloric AcidHCID 3283Diethyl EtherHCID 14945865Ethyl 3-bromo-4-methylbenzoate2 回HCID 21226445Aluminium lithium hydride2 回

生成物 1

HCID 12947381(3-Bromo-4-methylphenyl)methanol収率 90%

試薬・触媒・溶媒 1

HCID 8028
Tetrahydrofuran
溶媒
2 回

反応条件

温度
0 °C

実験手順

Ethyl 3-bromo-4-methylbenzoate was reduced follows: 2 equivalents lithium aluminium hydride (LAH) in THF was cooled to 0° C. Ethyl 3-bromo-4-methylbenzoate in anhydrous THF (10 mL) was added slowly to the cooled solution of LAH over 10 minutes, while stirring. The mixture was stirred at room temperature for 1 hour. The reaction was cooled to 0° C. and poured into ether (100 mL). The mixture was acidified by adding 1N HCl (aqueous) dropwise over 10 minutes. Separate fractions and wash aqueous phase with ether (50 mL). The fractions were combined and dried over magnesium sulfate. Solvent removal left a clear oil. The yield was 90%. 1H NMR (Varian 300 MHz, CDCl3, shifts relative to the solvent peak at 7.24 ppm) δ 7.5 (s, 1H) 7.2 (d, 1H) 7.1 (d, 1H), 4.6 (s, 2H) 2.3 (s, 3H).

後処理

  1. stirringThe mixture was stirred at room temperature for 1 hour
  2. washSeparate fractions and wash aqueous phase with ether (50 mL)
  3. dry with materialdried over magnesium sulfate
  4. customSolvent removal
  5. waitleft a clear oil

出典と根拠

ORDレコード
ord-03c3dc8dddf7458c8f6b03aa9367ac2d
出典データセット
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07732444B2

反応ノート

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