Potassium Phosphate, Tribasic → 4-Chloro-2-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridine

HRID 347530Notes

Reaction equation

HRID 347530 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[N:8]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[C:9](B(O)O)=[CH:10][C:3]=12.I[C:23]1[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>COCCOC.CCOC(C)=O.CC([O-])=O.CC([O-])=O.[Pd+2].C1(P(C2CCCCC2)C2C=CC=CC=2C2C(CCC)=CC(CCC)=CC=2CCC)CCCCC1>[Cl:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[N:8]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[C:9]([C:23]3[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=3)=[CH:10][C:3]=12

Participants

8

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 707143-IodopyridineHCID 21081673(4-chloro-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridin-2-yl)boronic acid

Product 1

HCID 210816764-Chloro-2-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridineYield 52.3%

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 21081571Dicyclohexyl(2',4',6'-tripropyl-[1,1'-biphenyl]-2-yl)phosphineCatalystHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

Argon was bubbled through a mixture of 4-chloro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridin-2-ylboronic acid (5.55 g, 17 mmol), 3-iodopyridine (6.97 g, 34 mmol), Pd(OAc)2, 2-dicyclohexylphosphino-2′,4′,6′-tri-1-propyl-1,1′-biphenyl (405 mg, 0.85 mmol), and K3PO4 (2 M in H2O, 34 mmol) in DME (50 mL) for 10 min and then heated at reflux overnight. The reaction mixture was diluted with EtOAc and washed with saturated aq. K2HPO4 solution. The title compound was purified by flash column chromatography (silica gel, 20% EtOAc/CH2Cl2) to afford the desired product (3.2 g, 52% yield) as an oil. LC/MS(ESI+) m/z 361 (M+H)+.

Workup

  1. temperatureheated
  2. temperatureat reflux overnight
  3. washwashed with saturated aq. K2HPO4 solution
  4. customThe title compound was purified by flash column chromatography (silica gel, 20% EtOAc/CH2Cl2)

Sources & evidence

ORD record
ord-083f4f23d8fc443688e30f2d2eb94193
Source dataset
uspto-grants-2007_02
Patent number
US07173031B2

Reaction notes

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