Flavokavain A → 1-(2-Hydroxy-4,6-dimethoxyphenyl)-3-(4-methoxyphenyl)-1-propanone

HRID 2254243ノート

反応式

HRID 2254243 の反応式
[OH:1][C:2]1[CH:19]=[C:18]([O:20][CH3:21])[CH:17]=[C:16]([O:22][CH3:23])[C:3]=1[C:4](=[O:15])[CH:5]=[CH:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][CH:8]=1.[H][H]>C(OCC)(=O)C.[Pd]>[OH:1][C:2]1[CH:19]=[C:18]([O:20][CH3:21])[CH:17]=[C:16]([O:22][CH3:23])[C:3]=1[C:4](=[O:15])[CH2:5][CH2:6][C:7]1[CH:8]=[CH:9][C:10]([O:13][CH3:14])=[CH:11][CH:12]=1

参加物

5

反応物 2

HCID 235736Flavokavain AHCID 178418361HCID 178418361、化合物

生成物 1

HCID 2700571-(2-Hydroxy-4,6-dimethoxyphenyl)-3-(4-methoxyphenyl)-1-propanone収率 93%

試薬・触媒・溶媒 2

HCID 23938Palladium触媒HCID 8857Ethyl Acetate溶媒2 回

実験手順

Then, 100 ml of an ethyl acetate solution of 10.0 g of 2'-hydroxy-4,4',6'-trimethoxychalcone was added to a suspension of 2.0 g of 5% palladium/carbon in 50 ml of ethyl acetate, in which a hydrogen gas had been sufficiently absorbed in advance, and the mixture was stirred at room temperature for 1 hour in a hydrogen gas atmosphere. After the reaction, the reaction mixture was filtered and the solvent was removed from the filtrate by distillation, and the obtained residue was recrystallized from a mixed solvent of methanol and ethyl acetate to obtain 9.3 g (yield=93.0%) of 1-(2-hydroxy-4,6-dimethoxyphenyl)-3-(4-methoxyphenyl)-1-propanone in the form of a colorless needle.

後処理

  1. customhad been sufficiently absorbed in advance
  2. customAfter the reaction
  3. filtrationthe reaction mixture was filtered
  4. customthe solvent was removed from the filtrate by distillation
  5. customthe obtained residue was recrystallized from a mixed solvent of methanol and ethyl acetate

出典と根拠

ORDレコード
ord-3a007470c34c465d9e8d7fdd3c1a02f0
出典データセット
uspto-grants-1993_08
特許番号
US05234951

反応ノート

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