Tributylphosphine → 3-(4-[2-(6,11-Dihydrodibenzo[b,e]oxepin-11-yloxy)-ethoxy]-phenyl)-2-ethoxy-propionic acid ethyl ester

HRID 1067861Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1067861
[C:1]1(OCCO)[C:11]2[CH2:10][C:9]3[CH:12]=[CH:13][CH:14]=[CH:15][C:8]=3[CH2:7][O:6][C:5]=2[CH:4]=[CH:3][CH:2]=1.C(P(CC[CH2:31][CH3:32])CCCC)CCC.[CH2:33]([O:35][C:36](=[O:49])[CH:37]([O:46][CH2:47][CH3:48])[CH2:38][C:39]1[CH:44]=[CH:43][C:42]([OH:45])=[CH:41][CH:40]=1)[CH3:34].C1CCN(C(N=NC(N2CCCCC2)=O)=[O:57])CC1>C1C=CC=CC=1.CCCCCCC>[CH2:33]([O:35][C:36](=[O:49])[CH:37]([O:46][CH2:47][CH3:48])[CH2:38][C:39]1[CH:40]=[CH:41][C:42]([O:45][CH2:32][CH2:31][O:57][CH:10]2[C:9]3[CH:12]=[CH:13][CH:14]=[CH:15][C:8]=3[CH2:7][O:6][C:5]3[CH:4]=[CH:3][CH:2]=[CH:1][C:11]2=3)=[CH:43][CH:44]=1)[CH3:34]

Komponenten

7

Edukt 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 11791243Ethyl 2-ethoxy-3-(4-hydroxyphenyl)propanoateHCID 21194993HCID 21194993, Verbindung

Produkt 1

HCID 99346953-(4-[2-(6,11-Dihydrodibenzo[b,e]oxepin-11-yloxy)-ethoxy]-phenyl)-2-ethoxy-propionic acid ethyl esterAusbeute 37 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 241BenzeneLösungsmittelHCID 8900HeptaneLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

Under a nitrogen atmosphere, 2-(6,11-dihydrodibenzo[b,e]oxepin-1-yloxy)-ethanol (256 mg, 1.0 mmol), tributylphosphine (223 mg, 1.1 mmol) and 2-ethoxy-3-(4-hydroxy-phenyl)-propionic acid ethyl ester (262 mg, 1.1 mmol) were successively dissolved in dry benzene (130 mL). Solid azodicarboxylic dipiperidine (ADDP) (278 mg, 1. 1 mmol) w as added under stirring at 0° C. to the solution. After 10 min, the reaction mixture was brought to room temperature and the stirring was continued for 16 h. Heptane (10 mL) was added to the reaction mixture and dihydro-ADDP separated out was filtered off. After evaporation of the solvent the product was purified chromatography eluting with ethyl acetate/heptane (1:4) to give 175 mg (37%) of the title compound: 1H NMR (300 MHz, CDCl3) δ1.15 (t, 3H), 1.25 (t, 3H), 2.93 (d, 2H), 3.30-3.40 (m, 1H), 3.55-3.65 (m, 1H), 3.65-3.75 (m, 1H),3.78-3.88 (m, 1H), 3.95 (t, 1H), 4. 10 (t, 2H), 4.15 (q, 2H), 4.85 (d, 1H), 5.25 (s, 1H), 6.15 (d, 1 H), 6.75 (d, 2H), 6.85-6.95 (m, 2H), 7.10 (d, 2H), 7.15-7.40 (m, 6H).

Aufarbeitung

  1. customwas brought to room temperature
  2. waitthe stirring was continued for 16 h
  3. customseparated out
  4. filtrationwas filtered off
  5. customAfter evaporation of the solvent the product
  6. customwas purified chromatography
  7. washeluting with ethyl acetate/heptane (1:4)

Quellen und Nachweise

ORD-Eintrag
ord-efd097b7b7be4d9990189dd2ee815b1b
Quelldatensatz
uspto-grants-2001_06
Patentnummer
US06248781B1

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