Diethylamine → Ethyl 3-(4-((5-(diethylamino)-2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)methoxy)phenyl)-2-methylpropanoate

HRID 1909604Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1909604
Br[C:2]1[CH:3]=[C:4]([CH2:13][O:14][C:15]2[CH:20]=[CH:19][C:18]([CH2:21][CH:22]([CH3:26])[C:23]([OH:25])=[O:24])=[CH:17][CH:16]=2)[C:5]2[O:9][C:8]([CH3:11])([CH3:10])[CH2:7][C:6]=2[CH:12]=1.[CH2:27]([NH:29][CH2:30][CH3:31])[CH3:28].[C:32]1(C2C=CC=CC=2)C=CC=C[C:33]=1P(C(C)(C)C)C(C)(C)C.CC(C)([O-])C.[Na+]>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O>[CH2:27]([N:29]([CH2:30][CH3:31])[C:2]1[CH:3]=[C:4]([CH2:13][O:14][C:15]2[CH:20]=[CH:19][C:18]([CH2:21][CH:22]([CH3:26])[C:23]([O:25][CH2:32][CH3:33])=[O:24])=[CH:17][CH:16]=2)[C:5]2[O:9][C:8]([CH3:11])([CH3:10])[CH2:7][C:6]=2[CH:12]=1)[CH3:28]

Komponenten

8

Edukt 4

HCID 8021DiethylamineHCID 27342152-(Di-tert-butylphosphino)biphenylHCID 23676156Sodium t-butoxideHCID 58566408HCID 58566408, Verbindung

Produkt 1

HCID 67405352Ethyl 3-(4-((5-(diethylamino)-2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)methoxy)phenyl)-2-methylpropanoate

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 9811564Bis(dibenzylideneacetone)palladiumKatalysatorHCID 962WaterLösungsmittelHCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of ethyl 3-(4-((5-bromo-2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)methoxy)phenyl)-2-methylpropanoate (110) (78 mg, 0.17 mmol), diethylamine (0.08 mL, 0.78 mmol), [1,1′-biphenyl]-2-yldi-tert-butylphosphine (16 mg, 0.052 mmol), tris(dibenzylideneacetone)dipalladium (47.6 mg, 0.052 mmol), and sodium t-butoxide (25 mg, 0.26 mmol) in toluene (2 mL) was heated in a pressure tube at 80° C. overnight. Water was added and the reaction was extracted with ethyl acetate and the combined organic layers dried over sodium sulfate, filtered and concentrated in vacuo. The crude compound was purified by flash column chromatography on silica gel with hexanes and EtOAc (50%) to give ethyl 3-(4-((5-(diethylamino)-2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)methoxy)phenyl)-2-methylpropanoate. The ester was dissolved in tetrahydrofuran (1.0 mL), methanol (1.0 mL) and water (3 mL). Lithium hydroxide was added and the reaction was stirred at room temperature for 24 hours. The mixture was acidified with 1M HCl and diluted with EtOAc (3 mL). The organic layer was washed with brine (3 mL), dried over sodium sulfate and filtered. The filtrate was concentrated in vacuo to yield 3-(4-((5-(diethylamino)-2,2-dimethyl-2,3-dihydrobenzofuran-7-yl)methoxy)phenyl)-2-methylpropanoic acid (118). 1H NMR (400 MHz, CDCl3) δ 7.38 (s, 1H), 7.18 (s, 1H), 7.09 (d, J=8.1 Hz, 2H), 6.87 (d, J=8.3 Hz, 2H), 5.04 (s, 2H), 3.84-3.47 (m, 2H), 3.34-3.09 (m, 2H), 3.06 (s, 2H), 3.01-2.89 (m, 1H), 2.78-2.57 (m, 2H), 1.51 (s, 6H), 1.18 (d, J=6.7 Hz, 3H), 1.07 (t, J=6.9 Hz, 6H). LC-MS ESI m/z: found 410.4 [M−H]−.

Aufarbeitung

  1. extractionthe reaction was extracted with ethyl acetate
  2. dry with materialthe combined organic layers dried over sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe crude compound was purified by flash column chromatography on silica gel with hexanes and EtOAc (50%)

Quellen und Nachweise

ORD-Eintrag
ord-257021612b5f48eb97f5c7732af719b3
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08598374B2

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