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

HRID 1844926Notes

Reaction equation

HRID 1844926 reaction equation
[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]([CH:37]3[CH2:41][CH2:40][CH2:39][CH2:38]3)=[CH:33][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.COCCOC>[CH:37]1([C:34]2[CH:35]=[CH:36][C:31]([C:29]3[CH:30]=[CH:25][N:26]=[C:27]([C:14]4[C:9]5[O:8][C:6]6[C:5]([C:10]=5[CH:11]=[CH:12][CH:13]=4)=[CH:4][CH:3]=[C:2]([CH3:1])[N:7]=6)[CH:28]=3)=[CH:32][CH:33]=2)[CH2:38][CH2:39][CH2:40][CH2:41]1

Participants

8

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 901214882-Methyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuro[2,3-b]pyridineHCID 901215232-Chloro-4-(4-cyclopentylphenyl)pyridine

Product 1

HCID 901215388-(4-(4-Cyclopentylphenyl)pyridine-2-yl)-2-methylbenzofuro[2,3-b]pyridineYield 73.3%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Procedure

A mixture of 2-methyl-8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzofuro[2,3-b]pyridine (2.5 g, 8.09 mmol), 2-chloro-4-(4-cyclopentylphenyl)pyridine (2.29 g, 8.89 mmol), Pd2(dba)3 (0.148 g 0.162 mmol), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine (0.266 g, 0.647 mmol), potassium phosphate (6.01 g, 28.3 mmol), DME (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 hexanes to give 8-(4-(4-cyclopentylphenyl)pyridine-2-yl)-2-methylbenzofuro[2,3-b]pyridine (2.4 g, 73% yield).

Workup

  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

Sources & evidence

ORD record
ord-8a34c93337f74e29a59844c46f0d084c
Source dataset
uspto-grants-2015_02
Patent number
US08946697B1

Reaction notes

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