Cesium carbonate → (E)-ethyl 3-(5-(benzylthio)-2-((3'-chloro-3-fluoro-5-methoxy-[1,1'-biphenyl]-4-yl)amino)phenyl)acrylate

Participants

Reaction Steps

A pressure vessel was charged with (E)-ethyl 3-(2-amino-5-(benzylthio)phenyl)acrylate (497.91 mg, 1.589 mmol, made via Method 42, Steps 1-2), 3′-chloro-3-fluoro-4-iodo-5-methoxy-1,1′-biphenyl (605 mg, 1.668 mmol), Xantphos (46.0 mg, 0.079 mmol), Pd2(dba)3 (36.4 mg, 0.040 mmol), and cesium carbonate (1035 mg, 3.18 mmol) were added. The vessel was flushed with Ar (g), then toluene (3177 μl) was added. The vessel was sealed and lowered into a 110° C. heating bath for 4 h. The heating bath was turned off, and the vessel was allowed to cool to RT with the bath. In the morning, the mixture was filtered through celite. The filter pad was washed with EtOAc (3×). The filtrate was concentrated. The residue was purified by chromatography on silica gel (40-g Redi-Sep Gold column, 0-30% EtOAc/Heptane with 5% DCM) to give (E)-ethyl 3-(5-(benzylthio)-2-((3′-chloro-3-fluoro-5-methoxy-[1,1′-biphenyl]-4-yl)amino)phenyl)acrylate (468.1 mg, 0.854 mmol, 53.8% yield) as a yellow solid. m/z (ESI) 548.2 (M+H)+.

Provenance & Evidence