Ethanol → HCID 68535612, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of crude 1-(3-chloro-4-fluorophenyl)ureido-6-bromo-1′-benzyloxycarbonyl-spiro[indoline-3,4′-piperidine] (˜0.27 mmol) and Pd(PPh3)4 (0.011 g, 0.030 mmol, 10 mol %) in degassed toluene (5 mL) was added a solution of 3-cyanophenylboronic acid (0.067 g, 0.46 mmol, 1.7 eq.), aqueous Na2CO3 (2.5 mL of a 2N solution, 5 mmol), and EtOH (2.5 mL). The resulting mixture was heated at 90° C. for 16 h then partitioned between EtOAc (20 mL) and 10% aqueous NaHCO3 (20 mL). The organic phase was separated and washed with 10% aqueous NaHCO3 (3×10 mL) and saturated brine (10 mL), dried over Na2SO4, filtered and concentrated by rotary evaporation. The crude residue was purified by flash column chromatography by eluting 10-20% EtOAc/hexane to give 1-(3-chloro-4-fluorophenyl)ureido-6-(3-cyanophenyl)-1′-benzyloxycarbonyl-spiro[indoline-3,4′-piperidine] as a yellowish oil (0.057 g, 0.097 mmol, 36%). 1H NMR (300 MHz, CD3OD): δ 7.23 to 8.31 (m, 15H), 5.27 (s, 2H), 4.32 (d, 2H), 4.21 (s, 2H), 3.17 (m, 2H), 1.98 (m, 2H), 1.82 (m, 2H).

Provenance & Evidence