Ethanol → 4-(1,4-Dioxaspiro[4.5]dec-8-yl)-1,3-benzenediol

HRID 346817

Reaktionsgleichung

Reaktionsgleichung von HRID 346817
C([O:8][C:9]1[CH:10]=[CH:11][C:12]([C:16]2[CH2:25][CH2:24][C:19]3([O:23][CH2:22][CH2:21][O:20]3)[CH2:18][CH:17]=2)=[C:13]([OH:15])[CH:14]=1)C1C=CC=CC=1.O1CCCC1.C(O)C>ClCCl.[Pd]>[O:20]1[C:19]2([CH2:24][CH2:25][CH:16]([C:12]3[CH:11]=[CH:10][C:9]([OH:8])=[CH:14][C:13]=3[OH:15])[CH2:17][CH2:18]2)[O:23][CH2:22][CH2:21]1

Komponenten

6

Edukt 3

HCID 702EthanolHCID 8028TetrahydrofuranHCID 117392405-(Benzyloxy)2-(1,4-dioxaspiro[4.5]dec-7-en-8-yl)phenol

Produkt 1

HCID 99212574-(1,4-Dioxaspiro[4.5]dec-8-yl)-1,3-benzenediolAusbeute 95,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A flask equipped with magnetic stirrer was charged with 5-(benzyloxy)-2-(1,4-dioxaspiro [4.5]dec-7-en-8-yl)phenol (14.5 g, 42.8 mmol) and tetrahydrofuran (50 ml) and ethanol (100 ml) and palladium (4.54 g, 10% on activated carbon) were added sequentially. The reaction vessel was than evacuated, placed under a hydrogen atmosphere and stirred vigorously for 24 hr. The reaction mixture was filtered through a celite plug, washing with ethyl acetate. The filtrate was concentrated in vacuo to give an off white solid. The crude solid was slurried in dichloromethane (200 ml), affording the title compound (10.2 g, 95%) as a white solid, m/z(ES+)251(M+H+).

Aufarbeitung

  1. customA flask equipped with magnetic stirrer
  2. additionwere added sequentially
  3. customthan evacuated
  4. filtrationThe reaction mixture was filtered through a celite plug
  5. washwashing with ethyl acetate
  6. concentrationThe filtrate was concentrated in vacuo
  7. customto give an off white solid

Quellen und Nachweise

ORD-Eintrag
ord-48d42b15a97e438f91637a6c8ff985e1
Quelldatensatz
uspto-grants-2007_02
Patentnummer
US07173052B2

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