Water → (R)-7-benzyloxy-3-(4-benzyloxyphenyl)-3,4-dihydro-2H-benzo[1,4]oxazine

HRID 1582810Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1582810
[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12](Br)=[C:13]([CH:32]=1)[O:14][CH2:15][C@H:16]([NH2:31])[C:17]1[CH:22]=[CH:21][C:20]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)=[CH:19][CH:18]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(C)([O-])C.[K+].O>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].C(OCC)(=O)C.CCCCCC>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]2[NH:31][C@H:16]([C:17]3[CH:22]=[CH:21][C:20]([O:23][CH2:24][C:25]4[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=4)=[CH:19][CH:18]=3)[CH2:15][O:14][C:13]=2[CH:32]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

8

Edukt 4

HCID 962WaterHCID 634876Binap, (A+-)-HCID 23665647Potassium tert-butoxideHCID 60086312(R)-2-(5-benzyloxy-2-bromophenoxy)-1-(4-benzyloxyphenyl)ethylamine

Produkt 1

HCID 20726824(R)-7-benzyloxy-3-(4-benzyloxyphenyl)-3,4-dihydro-2H-benzo[1,4]oxazineAusbeute 55 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 9811564Bis(dibenzylideneacetone)palladiumKatalysatorHCID 1140TolueneLösungsmittelHCID 21226206Ethyl acetate hexaneLösungsmittel

Versuchsvorschrift

A solution of (R)-2-(5-benzyloxy-2-bromophenoxy)-1-(4-benzyloxyphenyl)ethylamine (120 mg, 0.238 mmol), tris(dibenzylideneacetone)dipalladium (11 mg, 0.012 mmol), 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (15 mg, 0.024 mmol) and potassium-t-butoxide (37 mg, 0.330 mmol) in toluene (2.5 ml) was stirred for 3 hours at 100° C. under a nitrogen stream. After cooling, water was added to the reaction mixture, which was then extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: ethyl acetate/hexane=1/5, v/v) to give (R)-7-benzyloxy-3-(4-benzyloxy-phenyl)-3,4-dihydro-2H-benzo[1,4]oxazine (55.4 mg, Yield 55%).

Aufarbeitung

  1. temperatureAfter cooling
  2. extractionwas then extracted with ethyl acetate
  3. washThe organic layer was washed with saturated aqueous sodium chloride
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe resulting residue was purified by silica gel column chromatography (eluent

Quellen und Nachweise

ORD-Eintrag
ord-493a95dd266a4fe78375b7ab9a0b5295
Quelldatensatz
uspto-grants-2004_05
Patentnummer
US06737417B2

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