Sodium hydride → 2-(3-Cyano-3-(3,4-dichlorophenyl)propyl)oxytetrahydropyran

HRID 362704

反応式

HRID 362704 の反応式
[H-].[Na+].[Cl:3][C:4]1[CH:5]=[C:6]([CH2:11][C:12]#[N:13])[CH:7]=[CH:8][C:9]=1[Cl:10].Br[CH2:15][CH2:16][O:17][CH:18]1[CH2:23][CH2:22][CH2:21][CH2:20][O:19]1>C1COCC1>[Cl:3][C:4]1[CH:5]=[C:6]([CH:11]([CH2:15][CH2:16][O:17][CH:18]2[CH2:23][CH2:22][CH2:21][CH2:20][O:19]2)[C:12]#[N:13])[CH:7]=[CH:8][C:9]=1[Cl:10]

参加物

5

反応物 3

HCID 24758Sodium hydrideHCID 76690(3,4-Dichlorophenyl)acetonitrileHCID 866212-(2-Bromoethoxy)tetrahydro-2H-pyran

生成物 1

HCID 156708072-(3-Cyano-3-(3,4-dichlorophenyl)propyl)oxytetrahydropyran収率 67.2%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒3 回

実験手順

A suspension of 17.75 g of sodium hydride (80% dispersion in oil) in 750 ml of THF is cooled in an ice bath, a solution of 100 g of 3,4-dichlorophenylacetonitrile in 250 ml of THF is added dropwise and the reaction mixture is stirred for two hours at RT. It is cooled to -20° C., a solution of 112.36 g of 1-bromo-2-(tetrahydropyran-2-yloxy)ethane in 120 ml of THF is added dropwise and the reaction mixture is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed twice with a buffer solution of pH 4, with a buffer solution of pH 7 and twice with saturated NaCl solution and dried over Na2SO4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using toluene and then a toluene/AcOEt mixture (100/3; v/v) as the eluent to give 113.5 g of the expected product, which is used as such.

後処理

  1. temperatureis cooled in an ice bath
  2. temperatureIt is cooled to -20° C.
  3. stirringthe reaction mixture is stirred for 2 hours at RT
  4. concentrationIt is concentrated under vacuum
  5. extractionextracted with ether
  6. washthe organic phase is washed twice with a buffer solution of pH 4, with a buffer solution of pH 7 and twice with saturated NaCl solution
  7. dry with materialdried over Na2SO4
  8. customthe solvent is evaporated off under vacuum
  9. customThe residue is chromatographed on silica

出典と根拠

ORDレコード
ord-c1fd80bbc5e149e6a2c2d1a8d11e7d5d
出典データセット
uspto-grants-1999_02
特許番号
US05869663

関連ノート

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