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Hydrochloric Acid → 4-(1-Naphthyl)phenylboronic Acid (contains varying amounts of Anhydride)

HRID 909961
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 909961
Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[CH:11]=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.CCCCCC.C([Li])CCC.[B:29](OC(C)C)([O:34]C(C)C)[O:30]C(C)C.Cl>C1(C)C=CC=CC=1.C1COCC1>[C:8]1([C:5]2[CH:6]=[CH:7][C:2]([B:29]([OH:34])[OH:30])=[CH:3][CH:4]=2)[C:17]2[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=2)[CH:11]=[CH:10][CH:9]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

8

Edukt 5

HCID 313Hydrochloric AcidHCID 8058HexaneHCID 21531Triisopropyl borateHCID 112083381-(4-Bromophenyl)naphthaleneHCID 178418339Butyllithium

Produkt 1

HCID 441193994-(1-Naphthyl)phenylboronic Acid (contains varying amounts of Anhydride)Ausbeute 68,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 1140TolueneLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
-60 °C

Versuchsvorschrift

Under an argon gas atmosphere, a mixture of 208.8 g (737.4 mmol) of 1(4-bromophenyl)naphthalene and 2.1 L of dehydrated THF was cooled down to −60 degrees C., and added with 567 ml (884.9 mmol) of hexane solution of 1.56M n-butyllithium in drops while being stirred. Then, the reaction mixture was stirred for two hours at −60 degree C. 416 g (2.21 mol) of triisopropyl borate was dropped into the reaction solution at −60 degrees C. Subsequently, the reaction mixture was stirred for 17 hours at room temperature. The reaction mixture was further added with solution of hydrochloric acid to be stirred for one hour at room temperature. After the reaction, the reaction mixture was further added with toluene, so that aqueous phase thereof was eliminated. After organic phase thereof was dried with magnesium sulfate, the solvent was distilled away under reduced pressure. By recrystallizing the obtained solid by toluene, 126 g of 4-(1-naphthyl)phenylboronic acid was obtained at an yield of 67%.

Aufarbeitung

  1. stirringThen, the reaction mixture was stirred for two hours at −60 degree C
  2. stirringSubsequently, the reaction mixture was stirred for 17 hours at room temperature
  3. stirringto be stirred for one hour at room temperature
  4. customAfter the reaction
  5. dry with materialAfter organic phase thereof was dried with magnesium sulfate
  6. distillationthe solvent was distilled away under reduced pressure
  7. customBy recrystallizing the obtained solid by toluene

Quellen und Nachweise

ORD-Eintrag
ord-d3108a549e304c4ba1a76dfe8e26712a
Quelldatensatz
uspto-grants-2011_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08021574B2

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