N-bromobutanimide → Methyl 2-[2-(bromomethyl)phenyl]-2-oxoacetate

HRID 729041ノート

反応式

HRID 729041 の反応式
[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8](=[O:13])[C:9]([O:11][CH3:12])=[O:10].[Br:14]N1C(=O)CCC1=O>ClC(Cl)(Cl)Cl>[Br:14][CH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8](=[O:13])[C:9]([O:11][CH3:12])=[O:10]

参加物

4

反応物 2

HCID 67184N-bromobutanimideHCID 3768392Methyl (2-methylphenyl)(oxo)acetate

生成物 1

HCID 14697242Methyl 2-[2-(bromomethyl)phenyl]-2-oxoacetate収率 49.3%

試薬・触媒・溶媒 1

HCID 5943Carbon Tetrachloride溶媒

実験手順

5.34 g (30 millimoles) of methyl 2-methylphenylglyoxylate and 5.34 g (30 millimoles) of N-bromosuccinimide in 1,000 ml of tetrachloromethane are exposed to a 300 W Hg vapor lamp for one hour. Thereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution and dried over sodium sulfate/sodium carbonate. It is evaporated down and the crude product is then chromatographed over silica gel using 9:1 methyl tert-butyl ether/n-hexane. 3.8 g (49%) of the abovementioned compound is obtained as a yellow oil.

後処理

  1. washThereafter, the organic phase is washed once with water and three times with sodium bicarbonate solution
  2. dry with materialdried over sodium sulfate/sodium carbonate
  3. customIt is evaporated down
  4. customthe crude product is then chromatographed over silica gel using 9:1 methyl tert-butyl ether/n-hexane

出典と根拠

ORDレコード
ord-93d238dfeb2b4690897fe2ee6aee4d99
出典データセット
uspto-grants-1991_09
特許番号
US05051447

反応ノート

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