Sodium t-butoxide → HCID 71280013, compound

HRID 246479Notes

Reaction equation

HRID 246479 reaction equation
Br[C:2]1[N:3]=[C:4]2[C:10]([C:11]([NH:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])=[CH:9][N:8]([CH2:18][O:19][CH2:20][CH2:21][Si:22]([CH3:25])([CH3:24])[CH3:23])[C:5]2=[N:6][CH:7]=1.[F:26][C:27]1[CH:28]=[C:29]2[C:33](=[CH:34][C:35]=1[F:36])[NH:32][N:31]=[CH:30]2.CC(C)([O-])C.[Na+]>O1CCOCC1.CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C>[C:14]([NH:13][C:11]([C:10]1[C:4]2[C:5](=[N:6][CH:7]=[C:2]([N:32]3[C:33]4[C:29](=[CH:28][C:27]([F:26])=[C:35]([F:36])[CH:34]=4)[CH:30]=[N:31]3)[N:3]=2)[N:8]([CH2:18][O:19][CH2:20][CH2:21][Si:22]([CH3:25])([CH3:24])[CH3:23])[CH:9]=1)=[O:12])([CH3:17])([CH3:16])[CH3:15]

Participants

6

Reactant 3

HCID 23676156Sodium t-butoxideHCID 513585545,6-Difluoro-1H-indazoleHCID 715756452-bromo-N-(tert-butyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 71280013HCID 71280013, compoundYield 68.3%

Reagents, catalysts & solvents 2

HCID 178418851HCID 178418851, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
125 °C

Procedure

To a stirred solution of 2-bromo-N-tert-butyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (150 mg, 351 μmol) and 5,6-difluoro-1H-indazole (54.1 mg, 351 μmol) in dioxane (5.25 mL) was added sodium tert-butoxide (74.2 mg, 772 μmol) and bis(tri-tert-butylphosphine)palladium(0) (17.9 mg, 35.1 μmol). The mixture was degassed then heated in sealed tube at 125° C. for 15 h. The mixture was cooled, filtered through celite, the cake washed with ethyl acetate, and the combined filtrates were concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-40% ethyl acetate in hexanes) gave N-tert-butyl-2-(5,6-difluoro-1H-indazol-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (120 mg, 68%). 1H NMR (CDCl3) δ: 9.17 (s, 1H), 8.50 (d, J=2.5 Hz, 1H), 8.44 (dd, J=10.0, 6.8 Hz, 1H), 8.37 (s, 1H), 8.30 (s, 1H), 8.24 (d, J=0.8 Hz, 1H), 5.72 (s, 2H), 3.55-3.61 (m, 2H), 1.61 (s, 9H), 0.93-0.96 (m, 2H), −0.03 (s, 9H).

Workup

  1. customThe mixture was degassed
  2. temperatureThe mixture was cooled
  3. filtrationfiltered through celite
  4. washthe cake washed with ethyl acetate
  5. concentrationthe combined filtrates were concentrated in vacuo
  6. customPurification by chromatography (silica, 24 g Analogix column, 0-40% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-7a47f6d178e04e6ea24fc079c47b0662
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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