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Water → methyl E-4-[3-(4-cyanobenzyl)-5-(2-hydroxyphenyl)pent-4-enyl]benzoate

HRID 1927409
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1927409
C([Li])CCC.[Br-].[OH:7][C:8]1[CH:33]=[CH:32][CH:31]=[CH:30][C:9]=1[CH2:10][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[C:34]([C:36]1[CH:57]=[CH:56][C:39]([CH2:40][CH:41]([CH:54]=O)[CH2:42][CH2:43][C:44]2[CH:53]=[CH:52][C:47]([C:48]([O:50][CH3:51])=[O:49])=[CH:46][CH:45]=2)=[CH:38][CH:37]=1)#[N:35].O>CCCCCC.C1COCC1>[C:34]([C:36]1[CH:37]=[CH:38][C:39]([CH2:40][CH:41](/[CH:54]=[CH:10]/[C:9]2[CH:30]=[CH:31][CH:32]=[CH:33][C:8]=2[OH:7])[CH2:42][CH2:43][C:44]2[CH:45]=[CH:46][C:47]([C:48]([O:50][CH3:51])=[O:49])=[CH:52][CH:53]=2)=[CH:56][CH:57]=1)#[N:35]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 962WaterHCID 2724142(2-Hydroxybenzyl)triphenylphosphonium bromideHCID 57831360Methyl 4-[3-(4-cyanobenzyl)-4-oxobutyl]benzoateHCID 178418339Butyllithium

Produkt 1

HCID 57831354methyl E-4-[3-(4-cyanobenzyl)-5-(2-hydroxyphenyl)pent-4-enyl]benzoate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028
Tetrahydrofuran
Lösungsmittel
2×
HCID 8058HexaneLösungsmittel

Versuchsvorschrift

5.91 ml (9.45 mmol) of a 1.6 M solution of n-butyllithium in hexane are slowly added to a solution of 1820 mg (4.05 mmol) of (2-hydroxybenzyl)triphenylphosphonium bromide in 10 ml of anhydrous THF at 0° C. Then, at this temperature, 1085 mg (3.38 mmol) of methyl 4-[3-(4-cyanobenzyl)-4-oxobutyl]benzoate, dissolved in 10 ml of THF, are slowly metered in. After warming to room temperature, the reaction solution is stirred for 12 hours, then some water is added and the mixture is concentrated to dryness. The residue is taken up in ethyl acetate, washed with water and saturated sodium chloride solution and dried over sodium sulfate. After filtration, the solvent is concentrated to dryness. The resulting crude product is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 4:1→2:1). 1150 mg (2.79 mmol, 83% of theory) of a colorless solid are obtained.

Aufarbeitung

  1. concentrationthe mixture is concentrated to dryness
  2. washwashed with water and saturated sodium chloride solution
  3. dry with materialdried over sodium sulfate
  4. filtrationAfter filtration
  5. concentrationthe solvent is concentrated to dryness
  6. customThe resulting crude product is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 4:1→2:1)
  7. custom1150 mg (2.79 mmol, 83% of theory) of a colorless solid are obtained

Quellen und Nachweise

ORD-Eintrag
ord-d0e742ff15e648faad1b30ff919d5e3c
Quelldatensatz
uspto-grants-2012_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08183271B2

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