Sodium Carbonate → N-(2-Bromo-5-cyano-3-hydroxy-6-methyl-3'-nitrobiphenyl-4-yl)-2,2-dimethylpropionamide

HRID 17275

反応式

HRID 17275 の反応式
[Br:1][C:2]1[C:7]([O:8]C)=[C:6]([NH:10][C:11](=[O:16])[C:12]([CH3:15])([CH3:14])[CH3:13])[C:5]([C:17]#[N:18])=[C:4]([CH3:19])[C:3]=1[C:20]1[CH:25]=[CH:24][CH:23]=[C:22]([N+:26]([O-:28])=[O:27])[CH:21]=1.BrB(Br)Br.C(=O)([O-])[O-].[Na+].[Na+]>ClCCl.O>[Br:1][C:2]1[C:7]([OH:8])=[C:6]([NH:10][C:11](=[O:16])[C:12]([CH3:15])([CH3:13])[CH3:14])[C:5]([C:17]#[N:18])=[C:4]([CH3:19])[C:3]=1[C:20]1[CH:25]=[CH:24][CH:23]=[C:22]([N+:26]([O-:28])=[O:27])[CH:21]=1

参加物

6

反応物 3

HCID 10340Sodium CarbonateHCID 25134Boron tribromideHCID 86630799N-(2-Bromo-5-cyano-3-methoxy-6-methyl-3'-nitrobiphenyl-4-yl)-2,2-dimethylpropionamide

生成物 1

HCID 86630803N-(2-Bromo-5-cyano-3-hydroxy-6-methyl-3'-nitrobiphenyl-4-yl)-2,2-dimethylpropionamide収率 82.5%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 6344Dichloromethane溶媒

反応条件

温度
-70 °C

実験手順

N-(2-Bromo-5-cyano-3-methoxy-6-methyl-3′-nitrobiphenyl-4-yl)-2,2-dimethylpropionamide (I-12) (630 mg, 1.41 mmol) was dissolved in dichloromethane (dewatered, 20 ml) under nitrogen atmosphere, cooled at −70° C. in a dry ice-methanol bath. 1 M tribromoborane (dichloromethane solution) (4.23 ml) was dropwise added to it at −70° C. to −68° C., followed by stirring for 2 hours with heating up to 0° C. The reaction liquid was diluted with cold water, followed by pH control at 6 to 7 by addition of aqueous 10% sodium carbonate solution. The organic matter was extracted with ethyl acetate, washed with saturated brine, dried on anhydrous magnesium sulfate, the solvent was evaporated away under reduced pressure. The resulting residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=3:1→3:2) to obtain the entitled compound (503 mg, 82%) as a pale yellow solid.

後処理

  1. temperaturewith heating up to 0° C
  2. customThe reaction liquid
  3. extractionThe organic matter was extracted with ethyl acetate
  4. washwashed with saturated brine
  5. dry with materialdried on anhydrous magnesium sulfate
  6. customthe solvent was evaporated away under reduced pressure
  7. customThe resulting residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=3:1→3:2)

出典と根拠

ORDレコード
ord-b841381e700d49a1be971cf84131fb70
出典データセット
uspto-grants-2010_06
特許番号
US07737166B2

関連ノート

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