Hexane → HCID 10610679, compound

Participants

Reaction Steps

A sample of ethyl 4-(2-methylpropionylamino)-3-nitrobenzoate (8.0 g, 0.0286 mol) was suspended in ethanol (75 mL) containing platinum oxide (50 mg). The reaction mixture was hydrogenated for 2 h at 35 psi. Thin-layer chromatographic analysis (SiO2, 1:1 hexane:ethyl acetate) showed disappearance of starting material along with the formation of a new lower-running spot (Rf =0.2). The mixture was then filtered through a pad of Celite and the pad washed with fresh ethanol. The filtrate was concentrated and the residue recrystallized from ethyl acetate-hexane. The solid was collected by filtration to give 5.0 g (70%) of ethyl 3-amino-4-(2-methylpropionylamino)benzoate. An analytical sample was prepared by recrystallization twice from ethyl acetate-hexane. The residue was collected by filtration and then dried in vacuo at acetone reflux to give a beige solid, mp 147°-149° C.

Provenance & Evidence