Water → 6,7-Dimethyl-4-oxo-1,2,3,4-tetrahydrophenanthrene

HRID 1656872Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1656872
CC([O-])(C)C.[K+].[CH3:7][C:8]1[CH:9]=[C:10]2[C:19](=[CH:20][C:21]=1[CH3:22])[CH:18]=[CH:17][C:16]1[CH2:15][CH2:14][CH2:13][C:12](=[O:23])[C:11]2=1.[CH2:24](I)[CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH:33]=[CH2:34].O>C1C=CC=CC=1>[CH3:7][C:8]1[CH:9]=[C:10]2[C:19](=[CH:20][C:21]=1[CH3:22])[CH:18]=[CH:17][C:16]1[CH2:15][CH2:14][CH:13]([CH2:34][CH2:33][CH2:32][CH2:31][CH2:30][CH2:29][CH2:28][CH2:27][CH2:26][CH:25]=[CH2:24])[C:12](=[O:23])[C:11]2=1.[CH3:7][C:8]1[CH:9]=[C:10]2[C:19](=[CH:20][C:21]=1[CH3:22])[CH:18]=[CH:17][C:16]1[CH2:15][CH2:14][CH2:13][C:12](=[O:23])[C:11]2=1

Komponenten

7

Edukt 4

HCID 962WaterHCID 1111946211-Iodoundec-1-eneHCID 229045956,7-Dimethyl-4-oxo-1,2,3,4-tetrahydrophenanthreneHCID 23665647Potassium tert-butoxide

Produkt 2

HCID 229045886,7-Dimethyl-4-oxo-3-(10-undecenyl)-1,2,3,4-tetrahydrophenanthreneAusbeute 39 %HCID 229045956,7-Dimethyl-4-oxo-1,2,3,4-tetrahydrophenanthreneAusbeute 47 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel2×

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

t-BuOK (3.6 g, 0.032 mole) was dissolved in 250 ml of dry benzene at 40°-50° C. To the stirred solution was added 6,7-Dimethyl-4-oxo-1,2,3,4-tetrahydrophenanthrene (3.6 g, 0.016 mole) in 50 ml of dry benzene and then, 10-undecenyl iodide (4.58 g, 0.016 mole) at 30° C. under N2. The mixture was heated to 60° C. for 2.5 hr under N2. After cooling the reaction mixture to room temperature, water was added. The whole mixture was extracted twice with diethylether. The combined diethylether solution was dried over anhydrous MgSO4. and then concentrated. Flash column chromatography of the residue on silica gel afforded 6,7-Dimethyl-4-oxo-3-(10-undecenyl)-1,2,3,4-tetrahydrophenanthrene as a sticky brown solid (2.36 g, 0.0063 mole, 39% yield) as a desired product, and unreacted 6,7-Dimethyl-4-oxo-1,2,3,4-tetrahydrophenanthrene (1.70 g, 47% recovered). 1H NMR (CDCl3)δ 1.29-1.62 (m,14H), 1.86-2.08 (m,4H), 2.21-2.35 (m,2H), 2.40 (s,3H), 2.46 (s,3H), 2.52-2.63 (m,1H), 3.07-3.13 (m,2H), 4.90-5.04 (m,2H), 5.75-5.89 (m,1H), 7.17 (d, J=8.2 Hz,1H), 7.53 (s,1H), 7.77 (d, J=8.2 Hz,1H), 9.10 (s,1H), IR (KBr) cm-1 2920, 2850, 1669, 1600, exact (EI) mass. calcd. for C27H36O: 376.2766, Found: 376.2766.

Aufarbeitung

  1. customat 30° C.
  2. temperatureAfter cooling the reaction mixture to room temperature
  3. extractionThe whole mixture was extracted twice with diethylether
  4. dry with materialThe combined diethylether solution was dried over anhydrous MgSO4
  5. concentrationand then concentrated

Quellen und Nachweise

ORD-Eintrag
ord-b098e936609843a1979e2b620a32b709
Quelldatensatz
uspto-grants-1993_10
Patentnummer
US05256293

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