Hydrochloric Acid → 1-(3,5-Difluoro-4-methoxyphenyl)-2,2,2-trifluoroethanone

HRID 587772ノート

反応式

HRID 587772 の反応式
Br[C:2]1[CH:3]=[C:4]([F:11])[C:5]([O:9][CH3:10])=[C:6]([F:8])[CH:7]=1.[F:12][C:13]([F:19])([F:18])[C:14](OC)=[O:15].Cl>C1COCC1>[F:8][C:6]1[CH:7]=[C:2]([C:14](=[O:15])[C:13]([F:19])([F:18])[F:12])[CH:3]=[C:4]([F:11])[C:5]=1[O:9][CH3:10]

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 9893Methyl trifluoroacetateHCID 27732874-Bromo-2,6-difluoroanisole

生成物 1

HCID 867225781-(3,5-Difluoro-4-methoxyphenyl)-2,2,2-trifluoroethanone収率 100.3%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

Isopropyl magnesium chloride lithium chloride complex (22.0 mL, 28.02 mmol) was added dropwise to a stirred solution of 5-bromo-1,3-difluoro-2-methoxybenzene (5.0 g, 22.42 mmol) at −5° C. in THF (100 mL) and the reaction mixture was stirred at same temperature for 30 min. Methyl trifluoroacetate (3.67 g, 28.69 mmol) was added dropwise and the reaction mixture was stirred at ambient temperature for 2 h. A 2 N HCl solution (200 mL) was added to quench the reaction and then it was extracted with diethylether. The combined organic layers were washed with brine, dried (Na2SO4) filtered and concentrated to afford the title compound (5.4 g, crude) as a yellow liquid. The material was taken to next step without further purification. 1H NMR (400 MHz, CDCl3) δ 7.68-7.60 (m, 2H) 4.19 (s, 3H); ESIMS m/z 240.1 ([M]+).

後処理

  1. stirringthe reaction mixture was stirred at ambient temperature for 2 h
  2. customto quench
  3. customthe reaction
  4. extractionit was extracted with diethylether
  5. washThe combined organic layers were washed with brine
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated

出典と根拠

ORDレコード
ord-c941b14a50a14027819f3d5381de4a3c
出典データセット
uspto-grants-2016_01
特許番号
US09226501B2

反応ノート

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