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Cesium carbonate → Methyl 2,6-diamino-3-[2-(tert-butyldimethylsilanyloxymethyl)furan-3-yl]benzoate

HRID 927927
ノート
印刷プレビュー

反応式

HRID 927927 の反応式
Br[C:2]1[C:3]([NH2:13])=[C:4]([C:9]([NH2:12])=[CH:10][CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].[Si:14]([O:21][CH2:22][C:23]1[O:24][CH:25]=[CH:26][C:27]=1B(O)O)([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15].C(=O)([O-])[O-].[Cs+].[Cs+].F[B-](F)(F)F.C([PH+](C(C)(C)C)C(C)(C)C)(C)(C)C>O1CCOCC1.O.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[NH2:13][C:3]1[C:2]([C:27]2[CH:26]=[CH:25][O:24][C:23]=2[CH2:22][O:21][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:15])[CH3:16])=[CH:11][CH:10]=[C:9]([NH2:12])[C:4]=1[C:5]([O:7][CH3:8])=[O:6]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

8

反応物 4

HCID 10796Cesium carbonateHCID 2734635Tri-tert-butylphosphine tetrafluoroborateHCID 66685632Methyl 2,6-diamino-3-bromobenzoate2 回HCID 709840592-(Tert-butyldimethylsilanyloxymethyl)furan-3-boronic acid2 回

生成物 1

HCID 90071951Methyl 2,6-diamino-3-[2-(tert-butyldimethylsilanyloxymethyl)furan-3-yl]benzoate収率 59.8%

試薬・触媒・溶媒 3

HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 962Water溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
70 °C

実験手順

A mixture of methyl 3-bromo-2,6-diaminobenzoate (Intermediate 25, 2.6 g), 2-(tert-butyldimethylsilanyloxymethyl)furan-3-boronic acid (Intermediate 37, 3.5 g), cesium carbonate (11.35 g), tri-tert-butylphosphonium tetrafluoroborate (0.334 g) and tris-(dibenzylideneacetone)dipalladium (0.529 g) in dioxane (72 mL) and water (18 mL) was degassed and purged with nitrogen then heated at 70° C. for 75 minutes. After cooling, ethyl acetate and water were added and the mixture was filtered through Celite. The filtrate was separated and the organic layer was washed with brine, dried (MgSO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by chromatography on silica eluting with a mixture of ethyl acetate and cyclohexane with a gradient of 5-20% to give methyl 2,6-diamino-3-[2-(tert-butyldimethylsilanyloxymethyl)furan-3-yl]benzoate (2.39 g) as a viscous oil which was used without further characterization.

後処理

  1. customwas degassed
  2. custompurged with nitrogen
  3. temperatureAfter cooling
  4. additionethyl acetate and water were added
  5. filtrationthe mixture was filtered through Celite
  6. customThe filtrate was separated
  7. washthe organic layer was washed with brine
  8. dry with materialdried (MgSO4)
  9. filtrationfiltered
  10. customThe filtrate was evaporated to dryness
  11. customthe residue was purified by chromatography on silica eluting with a mixture of ethyl acetate and cyclohexane with a gradient of 5-20%

出典と根拠

ORDレコード
ord-f97f597d5bf64360b34dfa84ab211726
出典データセット
uspto-grants-2016_03
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09290472B2

反応ノート

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このページの内容参加物反応条件実験手順後処理出典と根拠反応ノート