Hydrochloric Acid → 1-[3-(2-{[Tert-butyl(dimethyl)silyl]oxy}ethyl)phenyl]ethanone

HRID 1246545ノート

反応式

HRID 1246545 の反応式
Br[C:2]1[CH:3]=[C:4]([CH2:8][CH2:9][O:10][Si:11]([C:14]([CH3:17])([CH3:16])[CH3:15])([CH3:13])[CH3:12])[CH:5]=[CH:6][CH:7]=1.[Li]CCCC.[CH3:23][C:24](N(C)C)=[O:25].Cl>O1CCCC1.CCCCCC.O>[Si:11]([O:10][CH2:9][CH2:8][C:4]1[CH:3]=[C:2]([C:24](=[O:25])[CH3:23])[CH:7]=[CH:6][CH:5]=1)([C:14]([CH3:17])([CH3:16])[CH3:15])([CH3:13])[CH3:12]

参加物

8

反応物 4

HCID 313Hydrochloric AcidHCID 31374DimethylacetamideHCID 11515183(3-Bromophenethoxy)(tert-butyl)dimethylsilaneHCID 178418339Butyllithium

生成物 1

HCID 692256631-[3-(2-{[Tert-butyl(dimethyl)silyl]oxy}ethyl)phenyl]ethanone

試薬・触媒・溶媒 3

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒HCID 8058Hexane溶媒

実験手順

To a solution of 1.6 g of [2-(3-bromophenyl)ethoxy](tert-butyl)dimethylsilane in tetrahydrofuran (20 ml) was added n-BuLi in hexane (1.57M, 3.88 ml) at −70° C., then the reaction mixture was stirred at same temperature for 30 min. To the solution was added dimethylacetamide (1.42 ml) drop wise at the same temperature. The mixture was stirred for another 1 hour. To the reaction mixture were added water and 8 ml of 1N HCl under ice-cooling. The mixture was stirred for 1 hour, then extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and concentrated in vacuo. The residue was purified by silica gel column chromatography with n-hexane and ethyl acetate (20/1–10/1) as an eluent to give 1-[3-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)phenyl]ethanone (350 mg) as colorless oil.

後処理

  1. stirringThe mixture was stirred for another 1 hour
  2. temperaturecooling
  3. stirringThe mixture was stirred for 1 hour
  4. extractionextracted with ethyl acetate
  5. washThe organic layer was washed with brine
  6. dry with materialdried over magnesium sulfate
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by silica gel column chromatography with n-hexane and ethyl acetate (20/1–10/1) as an eluent

出典と根拠

ORDレコード
ord-7932c995cf9a41b9b52e44f59945cd43
出典データセット
uspto-grants-2006_10
特許番号
US07125901B2

反応ノート

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