Sodium Carbonate → 4-(1H-pyrrol-3-yl)-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine

HRID 1692981Notes

Reaction equation

HRID 1692981 reaction equation
Cl[C:2]1[C:3]2[CH:10]=[CH:9][N:8]([CH2:11][O:12][CH2:13][CH2:14][Si:15]([CH3:18])([CH3:17])[CH3:16])[C:4]=2[N:5]=[CH:6][N:7]=1.C([Si](C(C)C)(C(C)C)[N:23]1[CH:27]=[CH:26][C:25](B(O)O)=[CH:24]1)(C)C.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH:23]1[CH:27]=[CH:26][C:25]([C:2]2[C:3]3[CH:10]=[CH:9][N:8]([CH2:11][O:12][CH2:13][CH2:14][Si:15]([CH3:18])([CH3:17])[CH3:16])[C:4]=3[N:5]=[CH:6][N:7]=2)=[CH:24]1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 27633031-(Triisopropylsilyl)pyrrole-3-boronic acidHCID 467367974-Chloro-7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo(2,3-d)pyrimidine

Product 1

HCID 584312944-(1H-pyrrol-3-yl)-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidineYield 57.2%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Procedure

A mixture of 4-chloro-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (12.9 g, 45.4 mmol) (prepared as in WO 2007/070514, Ex.65) and [1-(triisopropylsilyl)-1H-pyrrol-3-yl]boronic acid (Frontier Scientific) (10.4 g, 38.9 mmol) and sodium carbonate (4.36 g, 41.2 mmol) in 1,2-dimethoxyethane (100 mL) and water (35 mL) was degassed by purging with a stream of nitrogen for 20 minutes. Tetrakis(triphenylphosphine)palladium(0) (2.25 g, 1.94 mmol) was then added and the reaction was heated to reflux for 9 hours. As the coupling reaction proceeded, the TIPS protecting group was also slowly removed. The solvent was removed by rotary evaporation and the product was purified by flash column chromatography, eluting with a gradient from 10-50% ethyl acetate in hexanes to afford the desired product (7 g, 57%).

Workup

  1. customwas degassed
  2. customby purging with a stream of nitrogen for 20 minutes
  3. temperaturethe reaction was heated
  4. temperatureto reflux for 9 hours
  5. customAs the coupling reaction
  6. customthe TIPS protecting group was also slowly removed
  7. customThe solvent was removed by rotary evaporation
  8. customthe product was purified by flash column chromatography
  9. washeluting with a gradient from 10-50% ethyl acetate in hexanes

Sources & evidence

ORD record
ord-33668effe65d4709b60dfcfd34a5e2a6
Source dataset
uspto-grants-2012_04
Patent number
US08158616B2

Reaction notes

Loading…