Iodine → (3-Buten-1-yl)diphenylfluorosilane

HRID 8537

反応式

HRID 8537 の反応式
[Mg].II.Br[CH2:5][CH2:6][CH:7]=[CH2:8].[F:9][Si:10](F)([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1>CCOCC>[CH2:5]([Si:10]([C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1)([C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[F:9])[CH2:6][CH:7]=[CH2:8]

参加物

6

反応物 4

HCID 807Iodine2 回HCID 21241Homoallyl bromideHCID 67557DifluorodiphenylsilaneHCID 5462224Magnesium

生成物 1

HCID 22015847(3-Buten-1-yl)diphenylfluorosilane収率 83.1%

試薬・触媒・溶媒 1

HCID 3283Diethyl Ether溶媒2 回

実験手順

In a two-neck flask equipped with a condenser was placed magnesium (3.46 g, 142 mmol) and a crystal of iodine. The flask was warmed with heat gun until iodine had sublimed. A solution of 4-bromo-1-butene (9.62 g, 71.3 mmol) in ether (100 mL) was added dropwise in 30 min and the resulting mixture refluxed for 2 h. This Grignard solution was cooled to rt and added over 30 min via cannula to a second flask containing 24 (15.7 g, 71.3 mmol) in ether (100 mL) at rt. After stirring overnight at rt under argon, the reaction mixture was quenched with water (20 mL) and the organic layer isolated. The aqueous layer was extracted twice with 50-mL portions of ether. The combined organic extracts were washed with saturated aqueous NaCl, dried over Na2SO4, and concentrated. Distillation (134° C., 1.5 mm Hg) provided pure 31 as a colorless oil (15.2 g, 83%): 1H NMR (300 MHz, CDCl3) δ 7.62 (d, J=7.8 Hz, 4H), 7.50–7.39 (m, 6H), 5.97–5.83 (m, 1H), 5.02 (dd, J=17.1, 1.7 Hz, 1H), 4.94 (dd, J=10.2, 1.7 Hz, 1H), 2.28–2.20 (m, 2H), 1.38–1.30 (m, 2H); 13C NMR (75 MHz, CDCl3) δ 140.9, 135.9, 134.1, 129.7, 127.8, 113.1, 26.9, 14.0.

後処理

  1. customIn a two-neck flask equipped with a condenser
  2. temperatureThe flask was warmed
  3. temperaturethe resulting mixture refluxed for 2 h
  4. additionadded over 30 min via cannula to a second flask
  5. customthe reaction mixture was quenched with water (20 mL)
  6. customthe organic layer isolated
  7. extractionThe aqueous layer was extracted twice with 50-mL portions of ether
  8. washThe combined organic extracts were washed with saturated aqueous NaCl
  9. dry with materialdried over Na2SO4
  10. concentrationconcentrated
  11. distillationDistillation (134° C., 1.5 mm Hg)

出典と根拠

ORDレコード
ord-3fc3acc4d41f4e47bb631040264c388f
出典データセット
uspto-grants-2006_08
特許番号
US07087776B2

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