The isomerization of roccellic acid to threo-roccellic acid has been i
nvestigated. Reduction of dimethyl roccellate with LiAlH4 gave the cor
responding diol which yielded on oxidation with Jones' reagent two iso
meric gamma-lactones. 1-Methyl roccellic amide has been transformed by
a photochemical reaction to the delta-lactone acaranoic acid. Two cop
per complexes of roccellimide have been prepared.