1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine) → (E)-ethyl 3-(5-(benzylthio)-2-((4-bromo-5-fluoro-2-methoxyphenyl)amino)phenyl)-acrylate

Participants

Reaction Conditions

Reaction Steps

A screw cap vial was charged with (E)-ethyl 3-(2-amino-5-(benzylthio)phenyl)acrylate (0.500 g, 1.595 mmol), xantphos (0.185 g, 0.319 mmol), Pd2(dba)3 (0.146 g, 0.160 mmol), sodium tert-butoxide (0.153 g, 1.595 mmol) and toluene (7.98 ml). The vial was purged with Argon, sealed and heated to 130° C. for 10 minutes. The reaction was cooled to RT and 1-bromo-2-fluoro-4-iodo-5-methoxybenzene (0.581 g, 1.755 mmol) was added and the reaction was continued heating at 100° C. for an additional 30 minutes. The reaction was cooled to RT, diluted with water and extracted with DCM (3×). The combined organics were washed with water and brine, dried over magnesium sulfate, filtered and concentrated. The resulting material was concentrated, dissolved in minimal DCM and purified via column chromatography (silica gel 40 g, gradient elution 0 to 50% EtOAc:Heptane) to afford 0.40 g of (E)-ethyl 3-(5-(benzylthio)-2-((4-bromo-5-fluoro-2-methoxyphenyl)amino)phenyl)acrylate (0.400 g, 0.775 mmol, 48.6% yield). m/z (ESI) 471.0

Provenance & Evidence