Pentane → 5-Benzyloxy-4-t-butyl-2-(1-octenyl)benzofuran

HRID 1452351

Reaktionsgleichung

Reaktionsgleichung von HRID 1452351
CCCCC.C([Li])CCC.[Br-].[CH2:12]([P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].[CH2:38]([O:45][C:46]1[CH:47]=[CH:48][C:49]2[O:53][C:52]([CH:54]=O)=[CH:51][C:50]=2[C:56]=1[C:57]([CH3:60])([CH3:59])[CH3:58])[C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1>O1CCCC1>[CH2:38]([O:45][C:46]1[CH:47]=[CH:48][C:49]2[O:53][C:52]([CH:54]=[CH:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18])=[CH:51][C:50]=2[C:56]=1[C:57]([CH3:58])([CH3:60])[CH3:59])[C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1

Komponenten

6

Edukt 4

HCID 8003PentaneHCID 2724567Heptyltriphenylphosphonium bromideHCID 234428795-Benzyloxy-4-t-butyl-2-formylbenzofuranHCID 178418339Butyllithium

Produkt 1

HCID 543087225-Benzyloxy-4-t-butyl-2-(1-octenyl)benzofuranAusbeute 91,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

A pentane solution (2.6 ml, 4.2 mmol) of 1.6M n-butyllithium was added dropwise to a solution of n-heptyl-triphenylphosphonium bromide (1.84 g, 4.2 mmol) in tetrahydrofuran (10 ml) under a nitrogen atmosphere. After stirring the mixture at room temperature for 30 min, a solution of 5-benzyloxy-4-tert-butyl-2-formylbenzofuran (1.0 g, 3.2 mmol) in tetrahydrofuran (10 ml) was added dropwise. Subsequently, the mixture was stirred at room temperature for 30 min, poured into ice water and subjected to extraction with ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium hydrogen carbonate and water, then dried over anhydrous magnesium sulfate and concentrated. The concentrate was purified by silica gel chromatography (chloroform) to afford 5-benzyloxy-4-tert-butyl-2-(1-octenyl)benzofuran [1.14 g (yield, 91%)].

Aufarbeitung

  1. stirringSubsequently, the mixture was stirred at room temperature for 30 min
  2. extractionsubjected to extraction with ethyl acetate
  3. washThe organic layer was washed with a saturated aqueous solution of sodium hydrogen carbonate and water
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated
  6. customThe concentrate was purified by silica gel chromatography (chloroform)

Quellen und Nachweise

ORD-Eintrag
ord-0c524a98fa604ab28b3f3c9019a7cebd
Quelldatensatz
uspto-grants-1997_02
Patentnummer
US05606089

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