Toluene → Methyl 3-(4-trifluoromethylphenylamino)-2-pentenoate

Participants

Reaction Steps

In a 2L-flask were placed 4-trifluoromethylaniline (161 g, 1.00 mol), methyl 3-oxopentanoate (143 g, 1.10 mol) and toluene (640 ml). To this solution was added p-toluenesulfonic acid monohydrate (3.2 g, 0.017 mol), and the resulting mixture was heated in a bath kept at 100° C. under a reduced pressure of 27 kPa, while the water generated was taken out of the reaction system by using a Dean-Stark trap under reflux. After 15 hours, the heating was discontinued, nitrogen leaked in, and the reaction mixture cooled. The solvent was evaporated by means of a rotary-evaporator, and the residue was distilled under reduced pressure to give 207 g of the title compound. The yield was 75.8%.

Provenance & Evidence