Curtius rearrangement of arachidonic acid (I) in the presence of diphenyl phosphoryl azide in hot benzene gave isocyanate (II), which was coupled with methylamine to yield the title urea.
Curtius rearrangement of arachidonic acid (I) in the presence of diphenyl phosphoryl azide in hot benzene gave isocyanate (II), which was coupled with 2-fluoroethylamine (III) to yield the title urea.
Curtius rearrangement of arachidonic acid (I) in the presence of diphenyl phosphoryl azide in hot benzene gave isocyanate (II), which was coupled with ethanolamine (III) to yield the title urea.