Bromine → 2-Bromo-4-cyclopentoxy-3-hydroxy-benzaldehyde

HRID 746425

反応式

HRID 746425 の反応式
[CH:1]1([O:6][C:7]2[CH:14]=[CH:13][C:10]([CH:11]=[O:12])=[CH:9][C:8]=2[OH:15])[CH2:5][CH2:4][CH2:3][CH2:2]1.C([O-])(=O)C.[Na+].[Br:21]Br.S(=O)(O)[O-].[Na+]>C(O)(=O)C.[Fe]>[Br:21][C:9]1[C:8]([OH:15])=[C:7]([O:6][CH:1]2[CH2:2][CH2:3][CH2:4][CH2:5]2)[CH:14]=[CH:13][C:10]=1[CH:11]=[O:12]

参加物

7

反応物 4

HCID 24408BromineHCID 517045Sodium AcetateHCID 167261494-Cyclopentyloxy-3-hydroxybenzaldehydeHCID 23665763Sodium Bisulfite

生成物 1

HCID 211057072-Bromo-4-cyclopentoxy-3-hydroxy-benzaldehyde収率 58%

試薬・触媒・溶媒 2

HCID 23925Iron触媒HCID 176Acetic Acid溶媒2 回

反応条件

温度
15 °C

実験手順

4-cyclopentoxy-3-hydroxy-benzaldehyde (1.0 gm, 4.84 mmol) was dissolved in glacial acetic acid (20 ml). Anhydrous sodium acetate (0.8 gm, 9.7 mmol) was added to the above solution followed by powdered iron (0.022 gm). The system was flushed thoroughly with nitrogen. A solution of bromine (0.854 gm, 5.32 mmol) in glacial acetic acid (10 ml) was added to the above stirred suspension at 15° C. over a period of 15 min. The reaction mixture was stirred at 15° C. for 45 min. The reaction mixture was poured into aqueous 2% sodium bisulfite (100 ml) and stirred for 10 min. The precipitate was filtered washed with water (100 ml), and dried to obtain 800 mg of 2-bromo-4-cyclopentoxy-3-hydroxy-benzaldehyde as white powder mp: 107-109° C.

後処理

  1. customThe system was flushed thoroughly with nitrogen
  2. stirringstirred for 10 min
  3. filtrationThe precipitate was filtered
  4. washwashed with water (100 ml)
  5. customdried

出典と根拠

ORDレコード
ord-440d5b77ad774f189e3bb95825adb5b0
出典データセット
uspto-grants-2008_07
特許番号
US07393846B2

関連ノート

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