Potassium Carbonate → HCID 57566162, compound

Participants

Reaction Steps

To a solution of racemic (2′R,3R,4′S)-2′-(2-bromomethyl-5-fluoro-phenyl)-6-chloro-4′-(3-chlorophenyl)-2,3-dihydro-2,6′-dioxo-spiro[indole-3,3′-piperidine]-1-carboxylic acid tert-butyl ester (30 mg, 0.046 mmol) prepared in example 164b in acetonitrile (5 mL) was added K2CO3 (13 mg, 0.094 mmol) and 1-methanesulfonyl-piperazine (15 mg, 0.094 mmol). The mixture was refluxed for 2 h, concentrated. The residue was dissolved in trifluoroacetic acid and stirred at room temperature for 30 min, then concentrated and purified by prep-HPLC to give (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2′-[5-fluoro-2-(4-methanesulfonyl-piperazin-1-yl)methyl-phenyl]-spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as solid (5 mg, 17%).

Provenance & Evidence