2-Bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]amide → 2-(6-tert-butyl-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide

HRID 246028Notes

Reaction equation

HRID 246028 reaction equation
[C:1]([C:5]1[CH:13]=[C:12]2[C:8]([C:9]([Sn](CCCC)(CCCC)CCCC)=[N:10][N:11]2[CH3:14])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].[C:28]([CH:30]1[CH2:33][N:32]([C:34](=[O:58])[C@H:35]([NH:37][C:38]([C:40]2[C:48]3[C:43](=[N:44][CH:45]=[C:46](Br)[N:47]=3)[N:42]([CH2:50][O:51][CH2:52][CH2:53][Si:54]([CH3:57])([CH3:56])[CH3:55])[CH:41]=2)=[O:39])[CH3:36])[CH2:31]1)#[N:29]>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:28]([CH:30]1[CH2:31][N:32]([C:34](=[O:58])[C@H:35]([NH:37][C:38]([C:40]2[C:48]3[C:43](=[N:44][CH:45]=[C:46]([C:9]4[C:8]5[C:12](=[CH:13][C:5]([C:1]([CH3:2])([CH3:3])[CH3:4])=[CH:6][CH:7]=5)[N:11]([CH3:14])[N:10]=4)[N:47]=3)[N:42]([CH2:50][O:51][CH2:52][CH2:53][Si:54]([CH3:57])([CH3:56])[CH3:55])[CH:41]=2)=[O:39])[CH3:36])[CH2:33]1)#[N:29]

Participants

6

Reactant 2

HCID 584386122-Bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]amideHCID 712801066-tert-butyl-1-methyl-3-tributylstannanyl-1H-indazole

Product 1

HCID 712889062-(6-tert-butyl-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amideYield 85%

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

To a solution of 6-tert-butyl-1-methyl-3-tributylstannyl-1H-indazole (crude from Step 5, 217 mg, 0.45 mmol) and 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide (125 mg, 0.25 mmol) in DMF (1.5 mL) were added Pd(PPh3)4 (14 mg, 0.012 mmol) and copper(I) iodide (9 mg, 0.05 mmol). The yellow reaction mixture was purged with argon then heated at 80° C. for 1.5 h then cooled to room temperature, quenched with sat NH4Cl and extracted with EtOAc (2×). The combined organics were washed with sat LiCl and brine then dried over MgSO4 and concentrated. The crude residue was purified by silica gel chromatography with 50% to 100% EtOAc/heptane to isolate 129 mg (85%) of 2-(6-tert-butyl-1-methyl-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid [(R)-2-(3-cyano-azetidin-1-yl)-1-methyl-2-oxo-ethyl]-amide as a white solid.

Workup

  1. customThe yellow reaction mixture was purged with argon
  2. temperaturethen cooled to room temperature
  3. customquenched with sat NH4Cl
  4. extractionextracted with EtOAc (2×)
  5. washThe combined organics were washed with sat LiCl and brine
  6. dry with materialthen dried over MgSO4
  7. concentrationconcentrated
  8. customThe crude residue was purified by silica gel chromatography with 50% to 100% EtOAc/heptane

Sources & evidence

ORD record
ord-18c7db87151e41bd900ecdc9360d8162
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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