Boron Trichloride → 2-Methyl-3-(4'-methoxycarbonyl-3'-hydroxyphenyl)-1-naphthol

HRID 5291

反応式

HRID 5291 の反応式
[CH3:1][C:2]1[C:11]([C:12]2[CH:17]=[CH:16][C:15]([C:18]([O:20][CH3:21])=[O:19])=[C:14]([O:22]C)[CH:13]=2)=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]=1[OH:24].B(Cl)(Cl)Cl>C(Cl)Cl>[CH3:1][C:2]1[C:11]([C:12]2[CH:17]=[CH:16][C:15]([C:18]([O:20][CH3:21])=[O:19])=[C:14]([OH:22])[CH:13]=2)=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]=1[OH:24]

参加物

4

反応物 2

HCID 25135Boron TrichlorideHCID 186926612-Methyl-3-(4'-methoxycarbonyl-3'-methoxyphenyl)-1-naphthol

生成物 1

HCID 186926542-Methyl-3-(4'-methoxycarbonyl-3'-hydroxyphenyl)-1-naphthol収率 71.7%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

反応条件

温度
25 °C

実験手順

To a cooled (-78° C.) suspension of 7.0 g of 2-methyl-3-(4'-methoxycarbonyl-3'-methoxyphenyl)-1-naphthol in 100 mL of methylene chloride was added, dropwise over 10 minutes, 26 mL of 1 M boron trichloride in methylene chloride. The resulting mixture was stirred overnight at 25° C. and then quenched with 25 mL of methanol. The solution was washed with 3×40 mL of 1 N hydrochloric acid and then 2×50 mL of saturated sodium bicarbonate. The organic layer was dried over magnesium sulfate, filtered and concentrated. The residual oil was purified by flash chromatography (2:1 methylene chloride:hexane as eluent) to give 4.8 g of 2-methyl-3-(4'-methoxycarbonyl-3'-hydroxyphenyl)-1-naphthol as a white solid.

後処理

  1. temperatureTo a cooled
  2. additionwas added, dropwise over 10 minutes
  3. customquenched with 25 mL of methanol
  4. washThe solution was washed with 3×40 mL of 1 N hydrochloric acid
  5. dry with materialThe organic layer was dried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residual oil was purified by flash chromatography (2:1 methylene chloride:hexane as eluent)

出典と根拠

ORDレコード
ord-c12e9f988a1d48c99466fdb4537eb263
出典データセット
uspto-grants-1993_09
特許番号
US05244771

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