Trifluoroacetic acid ethanol → ethyl (2E)-4-aminobut-2-enoate trifluoroacetate

Participants

Reaction Steps

A solution of ethyl (2E)-4-(diformylamino)but-2-enoate (XV) (0.89 mg, 4.8 mmol) in a mixture trifluoroacetic acid-ethanol (absolute) (2:1, 10 mL) was stirred under reflux overnight (the reaction was followed by LC-MS and stopped when complete conversion was achieved). The solvent was evaporated under vacuum to obtain compound ethyl (2E)-4-aminobut-2-enoate trifluoroacetate (IV) as brown oil (undetermined yield), which was used without further purification in the next step.

Provenance & Evidence