Benzyl Alcohol → Pentafluorobenzoic acid, benzyl ester

HRID 10271

反応式

HRID 10271 の反応式
[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[C:8]([F:13])=[C:7]([F:14])[C:3]=1[C:4]([OH:6])=[O:5].[CH2:15](O)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1.Cl.CN(C)CCCN=C=NCC>CN(C)C1C=CN=CC=1.ClCCl.[Cl-].[Na+].O>[CH2:15]([O:5][C:4](=[O:6])[C:3]1[C:2]([F:1])=[C:10]([F:11])[C:9]([F:12])=[C:8]([F:13])[C:7]=1[F:14])[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1

参加物

7

反応物 3

HCID 244Benzyl AlcoholHCID 11770Pentafluorobenzoic acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride

生成物 1

HCID 517856Pentafluorobenzoic acid, benzyl ester収率 77.3%

試薬・触媒・溶媒 3

HCID 142844-(Dimethylamino)pyridine触媒HCID 6344Dichloromethane溶媒HCID 57417360Sodium chloride; water溶媒

反応条件

温度
0 °C

実験手順

A solution of 2,3,4,5,6-pentafluorobenzoic acid (15.25 g, 71.9 mmol), 4-dimethylaminopyridine (4.4 g, 36.0 mmol) and benzyl alcohol (7.4 mL, 71.5 mmol) in dichloromethane (150 mL) is cooled to 0° C. under an inert atmosphere. 1-[3-(Dimethylamino)propyl]-3-ethyl carbodiimide hydrochloride (16.7 g, 87.1 mmol) is added and the mixture stirred at 0° C. for 2 hours. The mixture is warmed to ambient temperature, stirred for 24 hours, and then poured into brine. The mixture is extracted with chloroform and the organic phase washed with NaHCO3, dried over Na2SO4, filtered and concentrated under vacuum to yield the title compound as a white solid (16.7 g). This material is used without further purification. 1H NMR (CDCl3): δ 7.49–7.27 (m, 5H), 5.40 (s, 2H).

後処理

  1. temperatureThe mixture is warmed to ambient temperature
  2. stirringstirred for 24 hours
  3. extractionThe mixture is extracted with chloroform
  4. washthe organic phase washed with NaHCO3
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated under vacuum

出典と根拠

ORDレコード
ord-0840a894e93d4828b9a71ddc2cef0484
出典データセット
uspto-grants-2006_08
特許番号
US07094780B1

関連ノート

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