5-Fluoro-2-nitrophenol → (2S)-2-[(5-Fluoro-2-nitrophenoxy)methyl]oxirane

HRID 584634

反応式

HRID 584634 の反応式
[CH2:1]1[O:3][C@@H:2]1[CH2:4][OH:5].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[F:25][C:26]1[CH:27]=[CH:28][C:29]([N+:33]([O-:35])=[O:34])=[C:30](O)[CH:31]=1.CCOC(/N=N/C(OCC)=O)=O>C1COCC1>[F:25][C:26]1[CH:31]=[CH:30][C:29]([N+:33]([O-:35])=[O:34])=[C:28]([CH:27]=1)[O:5][CH2:4][C@@H:2]1[CH2:1][O:3]1

参加物

6

反応物 4

HCID 99375-Fluoro-2-nitrophenolHCID 11776TriphenylphosphineHCID 5460455(+)-GlycidolHCID 5462977Diethyl azodicarboxylate

生成物 1

HCID 28109166(2S)-2-[(5-Fluoro-2-nitrophenoxy)methyl]oxirane収率 71%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

In a flask was added (R)-glycidol (0.994 g, 13.4 mmole) and triphenylphosphine (3.52 g, 13.4 mmole) and THF (20 ml, dried over molecular sieves), and 5-fluoro-2-nitrophenol (2.10 g, 13.4 mmole). The mixture was stirred until a homogeneous solution was obtained. The solution was cooled in an ice bath and diethylazodicarboxylate (DEAD, 2.11 ml, 13.4 mmole) was added dropwise over a few minutes. After completed addition, the flask was allowed to reach room temperature and stirred for an additional 2 hours. The solvent was removed in vaccuo and to the residue was added chloroform (5-10 ml). The precipitate (PPh3O) was removed by filtration and the solid was washed with an additional amount of chloroform (5-10 ml). The filtrate was added to a flash column (SiO2, Heptane:Ethyl acetate 4:1), and purified to give 2.02 g (71%) of the sub-title compound as a crystalline material after concentration of pure fractions.

後処理

  1. customwas obtained
  2. temperatureThe solution was cooled in an ice bath
  3. additionaddition
  4. customto reach room temperature
  5. stirringstirred for an additional 2 hours
  6. customThe solvent was removed in vaccuo and to the residue
  7. additionwas added chloroform (5-10 ml)
  8. customThe precipitate (PPh3O) was removed by filtration
  9. washthe solid was washed with an additional amount of chloroform (5-10 ml)
  10. additionThe filtrate was added to a flash column (SiO2, Heptane:Ethyl acetate 4:1)
  11. custompurified

出典と根拠

ORDレコード
ord-a278d7879ffc4c68929b95b57a96a4f3
出典データセット
uspto-grants-2005_08
特許番号
US06927222B2

関連ノート

読み込み中…