Hydrochloric Acid → HCID 13770519, compound

Participants

Reaction Steps

A mixture of 1.0 g. (3.1 mmoles) of ethyl 1-ethyl-5-(2-methyl-4,5-dihydro-1,3-dioxol-2-yl)oxindole-3-carboxylate and 809 mg. (6.3 mmoles) of 2,4-difluoroaniline in 40 ml of benzene was heated to reflux through a soxhlet filled with 4A sieves for 45 minutes. The reaction mixture was cooled and poured into a mixture of 400 ml. 2N hydrochloric acid and 100 ml. of methylene chloride. The organic layer was separated, dried over magnesium sulfate and concentrated to give 1.24 g. of a solid residue. Recrystallization from diisopropyl ether - methylene chloride gave 1.0 g. of product (80% yield), m.p. 166°-170° C.

Provenance & Evidence