HCID 131726634, compound → HCID 58978060, compound

Participants

Reaction Steps

A solution of (2E)-3-{2,6-difluoro-4-[(benzyloxycarbonyl)amino]phenyl}prop-2-enyl diazoacetate (9.7 g, 25.04 mmol) in 100 mL of 1,2-dichloroethane was added dropwise over 14 h to a refluxing solution of bis-(N-t-butylsalicylaldiminato)copper(II) (0.52 g, 1.25 mmol, prepared as described by R. G. Charles, J. Org. Chem. 1957, 22, 677) in toluene (1000 mL). After the addition was complete, the reaction mixture was heated for another hour at reflux, then cooled, filtered and concentrated. The crude oil was purified by column chromatography (0-1% methanol-dichoromethane) to provide the title compound as a racemate.

Provenance & Evidence