Carbon tetrabromide → 2-(5-Methoxy-1,2,3,4-tetrahydro-1-naphthyl)ethyl bromide

HRID 344039ノート

反応式

HRID 344039 の反応式
[CH3:1][O:2][C:3]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[CH2:5][CH2:6][CH2:7][CH:8]2[CH2:13][CH2:14]O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Br:35]C(Br)(Br)Br>ClCCl>[CH3:1][O:2][C:3]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[CH2:5][CH2:6][CH2:7][CH:8]2[CH2:13][CH2:14][Br:35]

参加物

5

反応物 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 106083702-(5-Methoxy-1,2,3,4-tetrahydro-1-naphthyl)ethanol

生成物 1

HCID 105638762-(5-Methoxy-1,2,3,4-tetrahydro-1-naphthyl)ethyl bromide収率 69%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

反応条件

温度
5 °C

実験手順

To a solution of 2-(5-methoxy-1,2,3,4-tetrahydro-1-naphthyl)ethanol (0.20 g) and triphenylphosphine (0.42 g) in dichloromethane (10 ml) was added tetrabromomethane (0.90 g) at 5° C. The solution was stirred at 5° C. for 1.5 hours and evaporated in vacuo. To the residue, ethyl acetate was added and the insoluble material was filtered off. The ethyl acetate solution was evaporated in vacuo. The residue was chromatographed (n-hexane) over silica gel to afford 2-(5-methoxy-1,2,3,4-tetrahydro-1-naphthyl)ethyl bromide (0.18 g) as a colorless oil.

後処理

  1. customevaporated in vacuo
  2. additionTo the residue, ethyl acetate was added
  3. filtrationthe insoluble material was filtered off
  4. customThe ethyl acetate solution was evaporated in vacuo
  5. customThe residue was chromatographed (n-hexane) over silica gel

出典と根拠

ORDレコード
ord-3251c7b1e6d043a999c253b377ccbdf9
出典データセット
uspto-grants-1999_01
特許番号
US05863918

反応ノート

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