Boron trifluoride etherate → 1-[6-(5-Bromo-2-chloro-benzyl)-2,3-dihydro-benzo[1,4]oxazin-4-yl]-2,2,2-trifluoro-ethanone

HRID 72572ノート

反応式

HRID 72572 の反応式
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([Cl:26])=[C:6]([CH:25]=1)[C:7]([C:9]1[CH:10]=[CH:11][C:12]2[O:17][CH2:16][CH2:15][N:14]([C:18](=[O:23])[C:19]([F:22])([F:21])[F:20])[C:13]=2[CH:24]=1)=O.B(F)(F)F.CCOCC.[SiH](CC)(CC)CC>ClCCCl.CC#N>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([Cl:26])=[C:6]([CH:25]=1)[CH2:7][C:9]1[CH:10]=[CH:11][C:12]2[O:17][CH2:16][CH2:15][N:14]([C:18](=[O:23])[C:19]([F:21])([F:22])[F:20])[C:13]=2[CH:24]=1

参加物

5

反応物 3

HCID 8000Boron trifluoride etherateHCID 12052TriethylsilaneHCID 866551971-[6-(5-Bromo-2-chloro-benzoyl)-2,3-dihydro-benzo[1,4]oxazin-4-yl]-2,2,2-trifluoro-ethanone

生成物 1

HCID 583408561-[6-(5-Bromo-2-chloro-benzyl)-2,3-dihydro-benzo[1,4]oxazin-4-yl]-2,2,2-trifluoro-ethanone収率 85.9%

試薬・触媒・溶媒 1

HCID 22402149Acetonitrile 1,2-dichloroethane溶媒

実験手順

To a stirred solution of 1-[6-(5-bromo-2-chloro-benzoyl)-2,3-dihydro-benzo[1,4]oxazin-4-yl]-2,2,2-trifluoro-ethanone (36 g, 80.35 mmol) in 1,2-dichloroethane:MeCN 1:2 (180 mL) was added BF3.OEt2 (13.2 mL, 104 mmol) and Et3SiH (26.9 mL, 168.7 mmol) at 0° C. The reaction mixture was stirred overnight at room temperature then quenched by the addition of aq. NaHCO3 (˜200 mL). The resulting mixture was extracted with ethyl acetate (3×200 mL), and the combined organic layers were washed with brine (200 mL) and dried over sodium sulfate. Crude product obtained after evaporation of solvent was purified by silica gel column chromatography to furnish 1-[6-(5-bromo-2-chloro-benzyl)-2,3-dihydro-benzo[1,4]oxazin-4-yl]-2,2,2-trifluoro-ethanone (30 g).

後処理

  1. customthen quenched by the addition of aq. NaHCO3 (˜200 mL)
  2. extractionThe resulting mixture was extracted with ethyl acetate (3×200 mL)
  3. washthe combined organic layers were washed with brine (200 mL)
  4. dry with materialdried over sodium sulfate
  5. customCrude product obtained
  6. customafter evaporation of solvent
  7. customwas purified by silica gel column chromatography

出典と根拠

ORDレコード
ord-eddbc94e7c034c62ade11f5f1b6b7749
出典データセット
uspto-grants-2014_09
特許番号
US08828951B2

反応ノート

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