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Phenethyl bromide → 4-(3-Phenylpropyl)pyridine

HRID 380525
ノート
印刷プレビュー

反応式

HRID 380525 の反応式
[N:1]1[CH:6]=[CH:5][C:4]([CH3:7])=[CH:3][CH:2]=1.C([Li])CCC.Br[CH2:14][CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1>C1COCC1>[C:16]1([CH2:15][CH2:14][CH2:7][C:4]2[CH:5]=[CH:6][N:1]=[CH:2][CH:3]=2)[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 3

HCID 7666Phenethyl bromideHCID 79634-MethylpyridineHCID 178418339Butyllithium

生成物 1

HCID 749374-(3-Phenylpropyl)pyridine

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

To a solution of 2.32 g (25.0 mmol) of 4-picoline in 40 mL of THF at −78° C. was slowly added 17.5 mL of a 1.6 M solution of n-butyllithium in hexanes (28.0 mmol). The reaction mixture was allowed to warm to rt and stirred for 1 h at rt. This reaction mixture was added via cannula to a solution of 6.8 mL (50.0 mmol) of (2-bromoethyl)benzene in 30 mL of THF at −50° C. The mixture was warmed to rt, quenched by the addition of 50 mL of H2O and extracted with ether. The combined organic fractions were extracted with 2N HCl. The combined aqueous fractions were brought to pH=12 with 5N NaOH and again extracted with ether. The combined ether layers were washed with sat'd NaCl solution, dried over MgSO4, filtered and the filtrate was concentrated. The residue was purified by chromatography (silica, hexanes:ethyl acetate=3:1) to give the title compound.

後処理

  1. customat −78° C.
  2. temperatureThe mixture was warmed to rt
  3. customquenched by the addition of 50 mL of H2O
  4. extractionextracted with ether
  5. extractionThe combined organic fractions were extracted with 2N HCl
  6. extractionagain extracted with ether
  7. washThe combined ether layers were washed with sat'd NaCl solution
  8. dry with materialdried over MgSO4
  9. filtrationfiltered
  10. concentrationthe filtrate was concentrated
  11. customThe residue was purified by chromatography (silica, hexanes:ethyl acetate=3:1)

出典と根拠

ORDレコード
ord-a011ab27953a465f859275b32a9747fb
出典データセット
uspto-grants-2001_10
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US06303593B1

反応ノート

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