Potassium Phosphate, Tribasic → 2-Methyl-8-(5-phenyl-2-pyridinyl)benzofuro[2,3-b]pyridine

HRID 1844930Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1844930
[CH3:1][C:2]1[N:7]=[C:6]2[O:8][C:9]3[C:14](B4OC(C)(C)C(C)(C)O4)=[CH:13][CH:12]=[CH:11][C:10]=3[C:5]2=[CH:4][CH:3]=1.Cl[C:25]1[CH:30]=[CH:29][C:28]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)=[CH:27][N:26]=1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(OC)=CC=CC=2OC)CCCCC1.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>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.C1(C)C=CC=CC=1>[CH3:1][C:2]1[N:7]=[C:6]2[O:8][C:9]3[C:14]([C:25]4[CH:30]=[CH:29][C:28]([C:31]5[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=5)=[CH:27][N:26]=4)=[CH:13][CH:12]=[CH:11][C:10]=3[C:5]2=[CH:4][CH:3]=1

Komponenten

8

Edukt 4

HCID 62657Potassium Phosphate, TribasicHCID 27628682-Chloro-5-phenylpyridineHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 901214882-Methyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuro[2,3-b]pyridine

Produkt 1

HCID 901216732-Methyl-8-(5-phenyl-2-pyridinyl)benzofuro[2,3-b]pyridineAusbeute 42,3 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 9811564Bis(dibenzylideneacetone)palladiumKatalysatorHCID 962WaterLösungsmittelHCID 1140TolueneLösungsmittel

Versuchsvorschrift

A mixture of 2-methyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuro[2,3-b]pyridine (3.0 g, 9.70 mmol), 2-chloro-5-phenylpyridine (2.024 g, 10.67 mmol), Pd2(dba)3 (0.178 g 0.192 mmol), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine (0.319 g, 0.776 mmol), potassium phosphate (7.21 g, 34.0 mmol), toluene (70 mL) and water (7 mL) was degassed with nitrogen and then refluxed overnight. It was concentrated and extracted with ethyl acetate. The ethyl acetate layer was dried on Na2SO4 and then further purified by column chromatography using ethyl acetate in hexanes to give 2-methyl-8-(5-phenylpyridin-2-yl)benzofuro[2,3-b]pyridine (1.38 g, 4.10 mmol, 42.3% yield).

Aufarbeitung

  1. customwas degassed with nitrogen
  2. temperaturerefluxed overnight
  3. concentrationIt was concentrated
  4. extractionextracted with ethyl acetate
  5. dry with materialThe ethyl acetate layer was dried on Na2SO4
  6. customfurther purified by column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-c5510a6857ab456ca187c14e7b28f700
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08946697B1

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