Potassium Nitrate → 1-Bromo-2,4-difluoro-5-nitrobenzene

HRID 53810

反応式

HRID 53810 の反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[F:9].[N+:10]([O-])([O-:12])=[O:11].[K+]>OS(O)(=O)=O>[Br:1][C:2]1[CH:7]=[C:6]([N+:10]([O-:12])=[O:11])[C:5]([F:8])=[CH:4][C:3]=1[F:9]

参加物

4

反応物 2

HCID 24434Potassium NitrateHCID 676741-Bromo-2,4-difluorobenzene

生成物 1

HCID 2230781-Bromo-2,4-difluoro-5-nitrobenzene収率 91.3%

試薬・触媒・溶媒 1

HCID 1118Sulfuric Acid溶媒

反応条件

温度
28 °C

実験手順

To a stirred solution of 1-bromo-2,4-difluorobenzene (0.512 g, 2.65 mmol, Aldrich, used as received) in conc. H2SO4 (5.0 mL) at 0° C., KNO3 (0.275 g, 2.72 mmol) was added in one portion. The resulting solution was allowed to warm to 28° C. and was stirred at that temperature overnight. It was then poured into ice (50 g) and extracted with ethylacetate (50 mL). The extract was dried over Na2SO4, and evaporated to afford 0.576 g (91%) pure title compound as light red oil; 1H NMR (CDCl3); δ 7.141 (dd, 1H, J1 10.2 Hz, J2 =7.8 Hz), 8.375 (t, 1H, J=7.5 Hz).

後処理

  1. extractionextracted with ethylacetate (50 mL)
  2. dry with materialThe extract was dried over Na2SO4
  3. customevaporated

出典と根拠

ORDレコード
ord-5b65582b6713465381b61a73f53f9b59
出典データセット
uspto-grants-1997_04
特許番号
US05620979

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