Potassium Phosphate, Tribasic → 8-(4-(3,4-Difluorophenyl)pyridin-2-yl)-2-methylbenzofuro[2,3-b]pyridine

HRID 1844931Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1844931
[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]=[C:29]([C:31]2[CH:36]=[CH:35][C:34]([F:37])=[C:33]([F:38])[CH:32]=2)[CH:28]=[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>[F:38][C:33]1[CH:32]=[C:31]([C:29]2[CH:28]=[CH:27][N:26]=[C:25]([C:14]3[C:9]4[O:8][C:6]5[C:5]([C:10]=4[CH:11]=[CH:12][CH:13]=3)=[CH:4][CH:3]=[C:2]([CH3:1])[N:7]=5)[CH:30]=2)[CH:36]=[CH:35][C:34]=1[F:37]

Komponenten

8

Edukt 4

HCID 62657Potassium Phosphate, TribasicHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 115503572-Chloro-4-(3,4-difluorophenyl)pyridineHCID 901214882-Methyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuro[2,3-b]pyridine

Produkt 1

HCID 901216158-(4-(3,4-Difluorophenyl)pyridin-2-yl)-2-methylbenzofuro[2,3-b]pyridineAusbeute 65,4 %

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-4-(3,4-difluorophenyl)pyridine (2.41 g, 10.67 mmol), Pd2(dba)3 (0.178 g 0.194 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. The mixture 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 dichloromethane to give 8-(4-(3,4-difluorophenyl)pyridin-2-yl)-2-methylbenzofuro[2,3-b]pyridine (2.36 g, 6.34 mmol, 65.3% yield).

Aufarbeitung

  1. customwas degassed with nitrogen
  2. temperaturerefluxed overnight
  3. concentrationThe mixture 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-4e0ecaaa8aaf4257b8b052e56ecc9a29
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08946697B1

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