3-(4-Fluorophenyl)-2-methylpropanoic acid → 6-Fluoro-2-methylindan-1-one

HRID 377357ノート

反応式

HRID 377357 の反応式
[F:1][C:2]1[CH:13]=[CH:12][C:5]([CH2:6][CH:7]([CH3:11])[C:8]([OH:10])=O)=[CH:4][CH:3]=1>O>[F:1][C:2]1[CH:3]=[C:4]2[C:5]([CH2:6][CH:7]([CH3:11])[C:8]2=[O:10])=[CH:12][CH:13]=1

参加物

3

反応物 1

HCID 154877913-(4-Fluorophenyl)-2-methylpropanoic acid

生成物 1

HCID 114465226-Fluoro-2-methylindan-1-one

試薬・触媒・溶媒 1

HCID 962Water溶媒

反応条件

温度
95 °C

実験手順

To polyphosphoric acid (932 g) at 70° C. on the steam bath is added p-fluoro-α-methylhydrocinnamic acid (93.2 g, 0.5 mole) slowly with stirring. The temperature is gradually raised to 95° C., and the mixture is kept at that temperature for 1 hour. The mixture is allowed to cool and added to 2 liters of water. The aqueous layer is extracted with ether, the ether solution washed twice with saturated sodium chloride solution, 5% Na2CO3 solution, water, and then dried. The ether filtrate is concentrated with 200 g silica-gel, and added to a five pound silica-gel column packed with 5% ether-petroleum ether. The column is eluted with 5-10% ether-petroleum ether and followed by TLC to give 6-fluoro-2-methylindanone.

後処理

  1. temperatureto cool
  2. extractionThe aqueous layer is extracted with ether
  3. washthe ether solution washed twice with saturated sodium chloride solution, 5% Na2CO3 solution, water
  4. customdried
  5. concentrationThe ether filtrate is concentrated with 200 g silica-gel
  6. additionadded to a five pound silica-gel column
  7. washThe column is eluted with 5-10% ether-petroleum ether

出典と根拠

ORDレコード
ord-5f79ecaf29114182b72fd7efa97f84a6
出典データセット
uspto-grants-2000_02
特許番号
US06025394

反応ノート

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