Phosphorus tribromide → (2E,6E)-1-bromo-3,7,11-trimethyldodeca-2,6,10-triene

HRID 129782

反応式

HRID 129782 の反応式
O[CH2:2]/[CH:3]=[C:4](/[CH2:6][CH2:7]/[CH:8]=[C:9](/[CH2:11][CH2:12][CH:13]=[C:14]([CH3:16])[CH3:15])\[CH3:10])\[CH3:5].P(Br)(Br)[Br:18]>CCOCC>[CH3:5]/[C:4](/[CH2:6][CH2:7]/[CH:8]=[C:9](\[CH3:10])/[CH2:11][CH2:12][CH:13]=[C:14]([CH3:16])[CH3:15])=[CH:3]\[CH2:2][Br:18]

参加物

4

反応物 2

HCID 24614Phosphorus tribromideHCID 445070Farnesol

生成物 1

HCID 5366048(2E,6E)-1-bromo-3,7,11-trimethyldodeca-2,6,10-triene収率 215.5%

試薬・触媒・溶媒 1

HCID 3283Diethyl Ether溶媒2 回

実験手順

A solution of 1.00 g (4.5 mmol) of (E,E)-farnesol (Aldrich, further purified by flash chromatography) in 10 mL of distilled ether at 0° C. under argon in the dark was treated dropwise with a solution of 195 μL (2.05 mmol, 0.45 eq.) of PBr3 in 2 mL of diethyl ether (ether). The resultant mixture was stirred at 0° C. for one hour, then quenched with water and separated. The organic phase was washed with 5 mL of H2O, 5 mL of saturated NaHCO3, and 5 mL of brine, dried over Na2SO4 and evaporated to give 1.26 g (98%) of crude bromide as a clear oil.

後処理

  1. customquenched with water
  2. customseparated
  3. washThe organic phase was washed with 5 mL of H2O, 5 mL of saturated NaHCO3, and 5 mL of brine
  4. dry with materialdried over Na2SO4
  5. customevaporated

出典と根拠

ORDレコード
ord-ceaa324c0bde45f8b1f4c82d8b597e07
出典データセット
uspto-grants-1995_11
特許番号
US05470845

関連ノート

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