2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1,2,2-trimethyl-propyl)-amide → 2-(5-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1,2,2-trimethyl-propyl)-amide

HRID 245807Notes

Reaction equation

HRID 245807 reaction equation
[CH3:1][C@H:2]([NH:7][C:8]([C:10]1[C:18]2[C:13](=[N:14][CH:15]=[C:16](Br)[N:17]=2)[N:12]([CH2:20][O:21][CH2:22][CH2:23][Si:24]([CH3:27])([CH3:26])[CH3:25])[CH:11]=1)=[O:9])[C:3]([CH3:6])([CH3:5])[CH3:4].[Cl:28][C:29]1[CH:30]=[C:31]2[C:35](=[CH:36][CH:37]=1)[N:34]([CH3:38])[N:33]=[C:32]2[Sn](CCCC)(CCCC)CCCC>CN(C=O)C.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.[Cu]I>[CH3:1][C@H:2]([NH:7][C:8]([C:10]1[C:18]2[C:13](=[N:14][CH:15]=[C:16]([C:32]3[C:31]4[C:35](=[CH:36][CH:37]=[C:29]([Cl:28])[CH:30]=4)[N:34]([CH3:38])[N:33]=3)[N:17]=2)[N:12]([CH2:20][O:21][CH2:22][CH2:23][Si:24]([CH3:27])([CH3:26])[CH3:25])[CH:11]=1)=[O:9])[C:3]([CH3:6])([CH3:5])[CH3:4]

Participants

6

Reactant 2

HCID 585221172-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1,2,2-trimethyl-propyl)-amideHCID 712797995-chloro-1-methyl-3-tributylstannyl-1H-indazole

Product 1

HCID 712861652-(5-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1,2,2-trimethyl-propyl)-amideYield 82%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

In a round-bottomed flask, 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1,2,2-trimethyl-propyl)-amide (94 mg, 0.21 mmol) and 5-chloro-1-methyl-3-tributylstannyl-1H-indazole (367 mg, 0.40 mmol) were dissolved in DMF (1.9 ml). The flask was evacuated and backfilled with argon then tetrakis(triphenylphosphine)palladium(0) (12 mg, 0.010 mmol) and copper(I) iodide (8 mg, 0.042 mmol) were added. The reaction mixture was stirred at 90° C. in an oil bath for 3.5 h then cooled to room temperature, quenched with water and extracted with diethyl ether (2×). The combined organic layers were washed twice with water and once with brine then dried over sodium sulfate, filtered and concentrated. The residue was chromatographed over silica gel with EtOAc/hexanes (gradient 0-40% EtOAc) to afford 92 mg (82%) of 2-(5-chloro-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-1,2,2-trimethyl-propyl)-amide as an off-white solid.

Workup

  1. customThe flask was evacuated
  2. temperaturethen cooled to room temperature
  3. customquenched with water
  4. extractionextracted with diethyl ether (2×)
  5. washThe combined organic layers were washed twice with water and once with brine
  6. dry with materialthen dried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe residue was chromatographed over silica gel with EtOAc/hexanes (gradient 0-40% EtOAc)

Sources & evidence

ORD record
ord-6e81658f930844e6b0a3045654a432f1
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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