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Cesium carbonate → 1,3-Dichloro-2-(trifluoromethyl)-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene

HRID 532184
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 532184
[Cl:1][C:2]1[CH:3]=[C:4](B2OC(C)(C)C(C)(C)O2)[CH:5]=[C:6]([Cl:10])[C:7]=1OC.Br[C:21]([C:23]([F:26])([F:25])[F:24])=[CH2:22].C([O-])([O-])=O.[Cs+].[Cs+]>C1COCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[Cl:10][C:6]1[CH:5]=[C:4]([C:21]([C:23]([F:26])([F:25])[F:24])=[CH2:22])[CH:3]=[C:2]([Cl:1])[C:7]=1[C:23]([F:26])([F:25])[F:24]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 10796Cesium carbonateHCID 2726961-Propene, 2-bromo-3,3,3-trifluoro-HCID 534290482-(3,5-Dichloro-4-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Produkt 1

HCID 866850511,3-Dichloro-2-(trifluoromethyl)-5-(3,3,3-trifluoroprop-1-en-2-yl)benzeneAusbeute 81,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418476
HCID 178418476, Verbindung
Katalysator
HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

A mixture of 2-(3,5-dichloro-4-(methoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.4 g, 1.33 mmol), 2-bromo-3,3,3-trifluoroprop-1-ene (0.28 g, 1.59 mmol), Cs2CO3 (1.33 mL, 2M, 2.66 mmol) and Pd(PPh3)2Cl2 (28 mg) in THF (30 mL) was heated at 70° C. in a sealed tube for 4 h. The mixture was cooled to rt and partitioned between ether and H2O. The aqueous layer was extracted with EA and the combined organic layers were dried over Na2SO4. The solvent was removed under reduced pressure and the crude product was purified by column chromatography over silica gel eluted with hexanes to give 1,3-dichloro-2-(trifluoromethyl)-5-(3,3,3-trifluoro-prop-1-en-2-yl)benzene (0.2 g, yield 56%) as colorless oil. 1H NMR (400 MHz, CDCl3): δ 7.39 (s, 2 H), 6.00 (s, 1 H), 5.78 (s, 1 H), 3.93 (s, 3 H) ppm.

Aufarbeitung

  1. temperatureThe mixture was cooled to rt
  2. custompartitioned between ether and H2O
  3. extractionThe aqueous layer was extracted with EA
  4. dry with materialthe combined organic layers were dried over Na2SO4
  5. customThe solvent was removed under reduced pressure
  6. customthe crude product was purified by column chromatography over silica gel
  7. washeluted with hexanes

Quellen und Nachweise

ORD-Eintrag
ord-7a9342bdbae242e783d75af3d21256c2
Quelldatensatz
uspto-grants-2014_10
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08853186B2

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