Lawesson's reagent → (R)-8-(5-bromo-2-fluoro-phenyl)-8-methyl-6,6-dioxo-6lambda6-thia-9-aza-spiro[4.5]dec-2-en-10-thione

HRID 920166ノート

反応式

HRID 920166 の反応式
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:22])=[C:6]([C@@:8]2([CH3:21])[NH:17][C:16](=O)[C:11]3([CH2:15][CH:14]=[CH:13][CH2:12]3)[S:10](=[O:20])(=[O:19])[CH2:9]2)[CH:7]=1.COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:32])=CC=1.C([O-])(O)=O.[Na+]>O1CCOCC1>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:22])=[C:6]([C@@:8]2([CH3:21])[NH:17][C:16](=[S:32])[C:11]3([CH2:15][CH:14]=[CH:13][CH2:12]3)[S:10](=[O:20])(=[O:19])[CH2:9]2)[CH:7]=1

参加物

5

反応物 3

HCID 87949Lawesson's reagent3 回HCID 516892Sodium BicarbonateHCID 90025282(R)-8-(5-bromo-2-fluoro-phenyl)-8-methyl-6,6-dioxo-6lambda6-thia-9-aza-spiro[4.5]dec-2-en-10-one

生成物 1

HCID 90025491(R)-8-(5-bromo-2-fluoro-phenyl)-8-methyl-6,6-dioxo-6lambda6-thia-9-aza-spiro[4.5]dec-2-en-10-thione収率 71.4%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

反応条件

温度
80 °C

実験手順

A mixture of (R)-8-(5-bromo-2-fluoro-phenyl)-8-methyl-6,6-dioxo-6λ6-thia-9-aza-spiro[4.5]dec-2-en-10-one (410 mg, 1.06 mmol, Eq: 1.00) and Lawesson's reagent (427 mg, 1.06 mmol, Eq: 1.00) in dioxane (10 ml) was stirred at 80° C. for 2 hours. More Lawesson's reagent (427 mg, 1.06 mmol, Eq: 1.00) was added and stirring continued at 85° C. for 16 hours. More Lawesson's reagent (427 mg, 1.06 mmol, Eq: 1.00) was added and stirring continued at 95° C. for 6 hours. The reaction mixture was poured into sat. NaHCO3-solution and extracted twice with ethyl acetate. The organic layers were washed with brine, dried over Na2SO4, filtered and evaporated to give light yellow oil. The residue was chromatographed on 20 g silica gel with dichloromethane/heptane to give (R)-8-(5-bromo-2-fluoro-phenyl)-8-methyl-6,6-dioxo-6λ6-thia-9-aza-spiro[4.5]dec-2-en-10-thione (305 mg, 754 μmol, 71.4% yield) as a light yellow foam. MS (ISP): m/z=404.1 [M+H]+ and 406.2 [M+2+H]+.

後処理

  1. stirringstirring
  2. waitcontinued at 85° C. for 16 hours
  3. stirringstirring
  4. waitcontinued at 95° C. for 6 hours
  5. extractionextracted twice with ethyl acetate
  6. washThe organic layers were washed with brine
  7. dry with materialdried over Na2SO4
  8. filtrationfiltered
  9. customevaporated
  10. customto give light yellow oil
  11. customThe residue was chromatographed on 20 g silica gel with dichloromethane/heptane

出典と根拠

ORDレコード
ord-a818999a138f44e4be630b200d202cbf
出典データセット
uspto-grants-2016_03
特許番号
US09273042B2

反応ノート

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