Hydrogen Bromide → 6-{(Z)-1-Bromo-2-[(2R)-5-oxopyrrolidin-2-yl]ethenyl}-3-chloropyridin-2(1H)-one

HRID 70539ノート

反応式

HRID 70539 の反応式
Br.[Br:2]/[C:3](/[C:11]1[CH:16]=[CH:15][C:14]([Cl:17])=[C:13]([O:18]C)[N:12]=1)=[CH:4]\[C@@H:5]1[NH:9][C:8](=[O:10])[CH2:7][CH2:6]1.O>O1CCOCC1>[Br:2]/[C:3](/[C:11]1[NH:12][C:13](=[O:18])[C:14]([Cl:17])=[CH:15][CH:16]=1)=[CH:4]\[C@H:5]1[CH2:6][CH2:7][C:8](=[O:10])[NH:9]1

参加物

5

反応物 3

HCID 260Hydrogen BromideHCID 962WaterHCID 58452317(5R)-5-[(Z)-2-bromo-2-(5-chloro-6-methoxypyridin-2-yl)ethenyl]pyrrolidin-2-one

生成物 1

HCID 584524336-{(Z)-1-Bromo-2-[(2R)-5-oxopyrrolidin-2-yl]ethenyl}-3-chloropyridin-2(1H)-one収率 37%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

反応条件

温度
65 °C

実験手順

48% hydrobromic acid (2 mL) was added to a solution of (5R)-5-[(Z)-2-bromo-2-(5-chloro-6-methoxypyridin-2-yl)ethenyl]pyrrolidin-2-one (115 mg) in 1,4-dioxane (3 mL), and the mixture was stirred at 65° C. for one hour. The reaction solution was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and filtered. The solvent was then evaporated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform:methanol=10:0→4:1) to give the title compound as a colorless powder (40 mg, 37%).

後処理

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. customThe solvent was then evaporated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (chloroform:methanol=10:0→4:1)

出典と根拠

ORDレコード
ord-d463d54529ec456088cf0930fbb68622
出典データセット
uspto-grants-2014_09
特許番号
US08822503B2

反応ノート

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