6-Fluoro-1H-indazole → N-tert-Butyl-2-(6-fluoro-1H-indazol-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

HRID 246490Notes

Reaction equation

HRID 246490 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:35]=[C:34]2[C:30]([CH:31]=[N:32][NH:33]2)=[CH:29][CH:28]=1.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:33]3[C:34]4[C:30](=[CH:29][CH:28]=[C:27]([F:26])[CH:35]=4)[CH:31]=[N:32]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 178423506-Fluoro-1H-indazoleHCID 23676156Sodium t-butoxideHCID 715756452-bromo-N-(tert-butyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

Product 1

HCID 71280153N-tert-Butyl-2-(6-fluoro-1H-indazol-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide

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 (140 mg, 328 μmol), 6-fluoro-1H-indazole (43.0 mg, 316 mmol) in dioxane (2 mL) was added sodium tert-butoxide (66.8 mg, 695 μmol) and bis(tri-tert-butylphosphine)palladium(0) (16.1 mg, 31.6 μmol). The mixture was degassed then heated in sealed tube at 125° C. for two days. 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-(6-fluoro-1H-indazol-1-yl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide. 1H NMR (CDCl3) δ: 9.17 (s, 1H), 8.36 (s, 1H), 8.29 (dd, J=9.3, 2.3 Hz, 1H), 8.26 (d, J=1.0 Hz, 1H), 7.80 (dd, J=8.8, 5.0 Hz, 1H), 7.66 (s, 1H), 7.12 (td, J=8.9, 2.3 Hz, 1H), 5.72 (s, 2H), 3.54-3.63 (m, 2H), 1.62 (s, 9H), 0.90-1.00 (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-87a2214514804074831f4f542ed50fa4
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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