2-(1-Methyl-1H-pyrazolo[4,3-b]pyridin-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide → 2-(1-methyl-1H-pyrazolo[4,3-b]pyridin-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide

HRID 246290

Reaction equation

HRID 246290 reaction equation
[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14](Br)[N:15]=2)[N:10]([CH2:18][O:19][CH2:20][CH2:21][Si:22]([CH3:25])([CH3:24])[CH3:23])[CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(C1CN(C(=O)[C@H](NC(C2C3C(=NC=C([C:47]4[C:51]5=[N:52][CH:53]=[CH:54][CH:55]=[C:50]5[N:49]([CH3:56])[N:48]=4)N=3)NC=2)=O)C)C1)#N>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>[C:1]([NH:5][C:6]([C:8]1[C:16]2[C:11](=[N:12][CH:13]=[C:14]([C:47]3[C:51]4=[N:52][CH:53]=[CH:54][CH:55]=[C:50]4[N:49]([CH3:56])[N:48]=3)[N:15]=2)[N:10]([CH2:18][O:19][CH2:20][CH2:21][Si:22]([CH3:25])([CH3:24])[CH3:23])[CH:9]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 2

HCID 712886732-(1-Methyl-1H-pyrazolo[4,3-b]pyridin-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amideHCID 715756452-bromo-N-(tert-butyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 712796112-(1-methyl-1H-pyrazolo[4,3-b]pyridin-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamideYield 41%

Reagents, catalysts & solvents 3

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

Conditions

Temperature
80 °C

Procedure

In a round-bottomed flask, 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (110 mg, 0.26 mmol) and 1-methyl-3-tributylstannyl-1H-pyrazolo[4,3-b]pyridine (see Example 98, 340 mg, 0.40 mmol) were dissolved in DMF (2.4 ml). The reaction mixture was evacuated and backfilled with argon then tetrakis(triphenylphosphine)palladium (0) (15 mg, 0.013 mmol) and copper (I) iodide (10 mg, 0.053 mmol) were added. The reaction mixture was stirred at 80° C. overnight 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 12 g silica gel with EtOAc/hexanes (gradient: 0-70% EtOAc) to afford 51 mg (41%) of 2-(1-methyl-1H-pyrazolo[4,3-b]pyridin-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide as a light yellow solid.

Workup

  1. customThe reaction mixture 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 12 g silica gel with EtOAc/hexanes (gradient: 0-70% EtOAc)

Sources & evidence

ORD record
ord-b006fe7ef8c14181927952241a09c3e5
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Linked notes

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