Potassium Carbonate → benzyl 4-[4-[(1E)-1-phenylmethoxyimino-2,3-dihydroinden-5-yl]-5-pyridin-4-ylpyrazol-1-yl]piperidine-1-carboxylate

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Reaction Conditions

Reaction Steps

To benzyl 4-(4-bromo-3-(pyridin-4-yl)-1H-pyrazol-1-yl)piperidine-1-carboxylate (0.32 g; Example 5, Step 1) in 10 mL acetonitrile and 3 mL water was added 0.315 g (E)-1-(benzyloxyimino)-2,3-dihydro-1H-inden-5-ylboronic acid (prepared as described in example 2, step 4) and 0.30 g potassium carbonate. The reaction mixture was purged with nitrogen and 84 mg tetrakis(triphenyphosphine)palladium(0) catalyst was added. The reaction mixture heated to 80° C. for 2 hours, filtered through celite, and the filter cake was washed with acetonitrile. The filtrate was evaporated under vacuum to yield crude product. The residue was purified by chromatography, eluting with ethyl acetate to afford 0.36 g (83% yield) product as a colorless oil. 1H NMR (CDCl3) was consistent with the desired structure. LC/MS showed one peak with a M+1 molecular ion of m/z 598.3 by positive ESI.

Provenance & Evidence