Trimethylsilylacetylene → Ethyl 8-[(2,6-difluorobenzyl)oxy]-2-methyl-6-[(trimethylsilyl)ethynyl]imidazo[1,2-a]pyridine-3-carboxylate

HRID 1624090ノート

反応式

HRID 1624090 の反応式
Br[C:2]1[CH:3]=[C:4]([O:17][CH2:18][C:19]2[C:24]([F:25])=[CH:23][CH:22]=[CH:21][C:20]=2[F:26])[C:5]2[N:6]([C:8]([C:12]([O:14][CH2:15][CH3:16])=[O:13])=[C:9]([CH3:11])[N:10]=2)[CH:7]=1.[CH3:27][Si:28]([C:31]#[CH:32])([CH3:30])[CH3:29]>O1CCOCC1.C(N(C(C)C)CC)(C)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[F:26][C:20]1[CH:21]=[CH:22][CH:23]=[C:24]([F:25])[C:19]=1[CH2:18][O:17][C:4]1[C:5]2[N:6]([C:8]([C:12]([O:14][CH2:15][CH3:16])=[O:13])=[C:9]([CH3:11])[N:10]=2)[CH:7]=[C:2]([C:32]#[C:31][Si:28]([CH3:30])([CH3:29])[CH3:27])[CH:3]=1

参加物

6

反応物 2

HCID 66111TrimethylsilylacetyleneHCID 86717880Ethyl 6-bromo-8-[(2,6-difluorobenzyl)oxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylate

生成物 1

HCID 86718172Ethyl 8-[(2,6-difluorobenzyl)oxy]-2-methyl-6-[(trimethylsilyl)ethynyl]imidazo[1,2-a]pyridine-3-carboxylate

試薬・触媒・溶媒 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)触媒HCID 178418476HCID 178418476、化合物触媒HCID 68856316Dioxane diisopropylethylamine溶媒

反応条件

温度
50 °C

実験手順

1 g of ethyl 6-bromo-8-[(2,6-difluorobenzyl)oxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylate (Example 21A; 2.35 mmol; 1 equivalent) was initially charged in 52 ml of dioxane/diisopropylethylamine 1:1, and 165 mg of dichlorobis(triphenylphosphine)palladium(II) (0.24 mmol, 0.1 equivalents) and 45 mg of copper(I) iodide (0.24 mmol, 0.1 equivalents) were added. At RT, 1.3 ml of trimethylsilylacetylene (9.4 mmol, 4 equivalents) were slowly added dropwise. The resulting reaction mixture was stirred at 50° C. for 16 h. The mixture was then concentrated, water was added and the mixture was extracted three times with ethyl acetate. The combined organic phases were washed twice with 10% strength aqueous sodium thiosulphate solution and then with saturated sodium chloride solution and dried over magnesium sulphate, and the filtrate was concentrated. The residue was dissolved in methanol and purified by preparative HPLC (column: Nucleodur C18 Gravity 50×200 mm, 10 μm, gradient: A=water+0.1% concentrated aqueous ammonia solution, B=acetonitrile, 0 min=30% B, 5 min=30% B, 23 min=100% B, 28 min=100% B, 28.2 min=30% B, 34 min=30% B, flow rate 110 ml/min, wavelength 220 nm). This gave 726 mg of a solid (89% pure, 62% of theory).

後処理

  1. additionwere added
  2. customThe resulting reaction mixture
  3. concentrationThe mixture was then concentrated
  4. additionwater was added
  5. extractionthe mixture was extracted three times with ethyl acetate
  6. washThe combined organic phases were washed twice with 10% strength aqueous sodium thiosulphate solution
  7. dry with materialwith saturated sodium chloride solution and dried over magnesium sulphate
  8. concentrationthe filtrate was concentrated
  9. dissolutionThe residue was dissolved in methanol
  10. custompurified by preparative HPLC (column
  11. customA=water+0.1% concentrated aqueous ammonia solution, B=acetonitrile, 0 min=30% B, 5 min=30% B, 23 min=100% B, 28 min=100% B, 28.2 min=30% B, 34 min=30% B, flow rate 110 ml/min, wavelength 220 nm

出典と根拠

ORDレコード
ord-758283ae1fa54f3a9f208aa2be363814
出典データセット
uspto-grants-2014_07
特許番号
US08778964B2

反応ノート

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