1,1-Dimethylethyl 4-({[(2-fluoro-6-iodo-4-methylphenyl)amino]-carbonyl}amino)-1-piperidinecarboxylate → 1,1-Dimethylethyl 4-(4-fluoro-6-methyl-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)-1-piperidinecarboxylate

Participants

Reaction Conditions

Reaction Steps

Under an argon atmosphere, a mixture of 1,4-dioxane (3 ml), palladium 1,1′-bis(diphenylphosphino)ferrocene dichloride (10% mol, 0.0623 mmol, ˜x50 mg), NatBuO (2 eq., 1.26 mmol, 121 mg), were sonicated for 10 minutes at room temperature and 1,1-dimethylethyl 4-({[(2-fluoro-6-iodo-4-methylphenyl)amino]carbonyl}amino)-1-piperidine-carboxylate (D3) (1 eq., 0.623 mmol, 300 mg) was added at room temperature and the mixture was refluxed at 80° C. for one overnight. The reaction mixture was cooled to room temperature, poured onto NH4Cl (saturated solution) and the aqueous solution obtained was extracted with ethyl acetate repeatedly; the organics were combined, dried over Na2SO4, filtered and the solvent was evaporated to afford the crude compound (250 mg) that was purified by MDAP to yield the title compound, 30 mg, 11%.

Provenance & Evidence