Ethyl Acetate → 2,4-dichloro-5-(pyridin-2-yl)-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine

HRID 577705Notes

Reaction equation

HRID 577705 reaction equation
[Cl:1][C:2]1[N:3]=[C:4]([Cl:20])[C:5]2[C:10](I)=[CH:9][N:8]([CH2:12][O:13][CH2:14][CH2:15][Si:16]([CH3:19])([CH3:18])[CH3:17])[C:6]=2[N:7]=1.[Br-].[N:22]1[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=1[Zn+].CCOC(C)=O>C1COCC1.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>[Cl:1][C:2]1[N:3]=[C:4]([Cl:20])[C:5]2[C:10]([C:23]3[CH:24]=[CH:25][CH:26]=[CH:27][N:22]=3)=[CH:9][N:8]([CH2:12][O:13][CH2:14][CH2:15][Si:16]([CH3:19])([CH3:18])[CH3:17])[C:6]=2[N:7]=1

Participants

6

Reactant 3

HCID 8857Ethyl AcetateHCID 866796212,4-dichloro-5-iodo-7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo(2,3-d)pyrimidineHCID 178418723HCID 178418723, compound

Product 1

HCID 866796502,4-dichloro-5-(pyridin-2-yl)-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidineYield 43%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
65 °C

Procedure

To a solution of 2,4-dichloro-5-iodo-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (1.0 g, 2.25 mmol), as prepared in Example 5, step 1, in THF (11 mL) was added tetrakis(triphenylphosphine)palladium(0) (131 mg, 0.113 mmol) and pyridin-2-ylzinc(II) bromide (9 mL, 4.5 mmol, 0.5 M solution in THF) which was then heated to 65° C. and stirred for 3 hrs. EtOAc (10 mL) was added and the resulting mixture was washed with water (20 mL). The aqueous layer was extracted with EtOAc (three×10 mL), and the combined organic layers were then washed with 1 M aqueous Na2SO3 (20 mL), sat. aqueous NaHCO3 (20 mL), brine (20 mL), dried over Na2SO4, filtered and concentrated in vacuo. The residue was then purified via flash chromatography (20%-50% EtOAc/heptane) to give the title compound as a clear oil (378 mg, 43% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 8.59-8.71 (m, 1H) 8.21 (s, 1H) 7.89 (td, J=7.77, 1.89 Hz, 1H) 7.70 (d, J=7.83 Hz, 1H) 7.39 (ddd, J=7.52, 4.86, 1.01 Hz, 1H) 5.67 (s, 2H) 3.50-3.67 (m, 2H) 0.79-0.95 (m, 2H) −0.17-0.00 (m, 9H). m/z (APCI+) for C17H20N4OCl2Si 395.00/397.00 (M+H)+.

Workup

  1. washthe resulting mixture was washed with water (20 mL)
  2. extractionThe aqueous layer was extracted with EtOAc (three×10 mL)
  3. washthe combined organic layers were then washed with 1 M aqueous Na2SO3 (20 mL), sat. aqueous NaHCO3 (20 mL), brine (20 mL)
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was then purified via flash chromatography (20%-50% EtOAc/heptane)

Sources & evidence

ORD record
ord-d861731fa4b740bb9351ffdb4591f672
Source dataset
uspto-grants-2015_05
Patent number
US09040547B2

Reaction notes

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