Cyclopropylamine → N-cyclopropyl-2-methyl-3-(4-ethoxycarbonyl-1-piperazinyl)-4-fluoro-6-nitroaniline

Participants

Reaction Conditions

Reaction Steps

To 3,6-difluoro-2-(4-ethoxycarbonyl-1-piperazinyl)-5-nitrotoluene (7.1 g) are added anhydrous dimethylsulfoxide (23 ml), potassium fluoride (2.0 g) and cyclopropylamine (1.5 g), and the mixture is heated at 60° C. for 6 hours. The reaction mixture is poured into ice water, and extracted with dichloromethane. The solvent is distilled off and the residue is recrystallized from ethanol to give N-cyclopropyl-2-methyl-3-(4-ethoxycarbonyl-1-piperazinyl)-4-fluoro-6-nitroaniline (7.4 g), as orange red prisms, m.p. 97°-98° C.

Provenance & Evidence