Triethylamine → 7-[5-Formyl-2-trifluoromethoxy-phenyl]-3,3-dimethyl-2,3-dihydro-benzofuran-5-carboxylic acid dimethylamide

HRID 1790213

Reaktionsgleichung

Reaktionsgleichung von HRID 1790213
[CH3:1][N:2]([CH3:17])[C:3]([C:5]1[CH:6]=[C:7](Br)[C:8]2[O:12][CH2:11][C:10]([CH3:14])([CH3:13])[C:9]=2[CH:15]=1)=[O:4].C(N(CC)CC)C.C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2)CCCCC1.[B]1OC(C)(C)C(C)(C)O1.Br[C:60]1[CH:61]=[C:62]([CH:65]=[CH:66][C:67]=1[O:68][C:69]([F:72])([F:71])[F:70])[CH:63]=[O:64]>O1CCOCC1.C(OCC)(=O)C.CC([O-])=O.CC([O-])=O.[Pd+2].O>[CH3:1][N:2]([CH3:17])[C:3]([C:5]1[CH:6]=[C:7]([C:60]2[CH:61]=[C:62]([CH:63]=[O:64])[CH:65]=[CH:66][C:67]=2[O:68][C:69]([F:70])([F:72])[F:71])[C:8]2[O:12][CH2:11][C:10]([CH3:14])([CH3:13])[C:9]=2[CH:15]=1)=[O:4]

Komponenten

10

Edukt 5

HCID 8471TriethylamineHCID 27342162-(Dicyclohexylphosphino)biphenylHCID 6364989PinacolboraneHCID 131504163-Bromo-4-(trifluoromethoxy)benzaldehydeHCID 695216765-Benzofurancarboxamide, 7-bromo-2,3-dihydro-N,N,3,3-tetramethyl-

Produkt 1

HCID 865888657-[5-Formyl-2-trifluoromethoxy-phenyl]-3,3-dimethyl-2,3-dihydro-benzofuran-5-carboxylic acid dimethylamideAusbeute 50 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittelHCID 8857Ethyl AcetateLösungsmittelHCID 312751,4-DioxaneLösungsmittel2×

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a solution of 7-bromo-3,3-dimethyl-2,3-dihydro-benzofuran-5-carboxylic acid dimethylamide (437 mg, 1.46 mmol) in dioxane (4 mL), were added under argon, triethylamine (0.82 mL, 5.86 mmol), Pd(OAc)2 (16 mg, 0.07 mmol), 2-(dicyclohexylphosphino)biphenyl (103 mg, 0.29 mmol) and pinacolborane (0.64 mL, 4.40 mmol) dropwise. The mixture was heated at 80° C. under argon for 2 hrs then cooled to room temperature. Water (0.5 mL) was added dropwise, then Ba(OH)2.8H2O (1.38 g, 4.40 mmol) followed by 3-bromo-4-trifluoromethoxy benzaldehyde (473 mg, 1.76 mmol) dissolved in dioxane (1.2 mL). The mixture was refluxed for 4 hours then cooled to room temperature, diluted with ethyl acetate and filtered over celite. The solution was further washed with water and brine, dried over anhydrous magnesium sulfate, filtered and evaporated. The residue was purified on silica gel (5% methanol in dichloromethane) to give 264 mg of 7-[5-formyl-2-trifluoromethoxy-phenyl]-3,3-dimethyl-2,3-dihydro-benzofuran-5-carboxylic acid dimethylamide (containing 50% of 3,3-dimethyl-2,3-dihydro-benzofuran-5-carboxylic acid dimethylamide as determined by 1H NMR) use as this in the next step.

Aufarbeitung

  1. temperaturethen cooled to room temperature
  2. temperatureThe mixture was refluxed for 4 hours
  3. temperaturethen cooled to room temperature
  4. filtrationfiltered over celite
  5. washThe solution was further washed with water and brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. customevaporated
  9. customThe residue was purified on silica gel (5% methanol in dichloromethane)

Quellen und Nachweise

ORD-Eintrag
ord-b9e5ce56ff19449393d82f4c2ca17317
Quelldatensatz
uspto-grants-2006_07
Patentnummer
US07071218B2

Verknüpfte Notizen

Wird geladen…