Complete Ozonolysis of 3-Methyl-4-(prop-1-en-1-yl)cyclohexene

Complete ozonolysis of the thermal dimer of piperylene, 3-methyl-4-(prop-1-en-1-yl)cyclohexene, followed by reduction of primary peroxy compounds with dimethyl sulfide, gave 2-methyl-3-formyl-1,6-hexanedial as the major product and five-and six-membered hydroxy lactones which were formed via intramolecular cyclization of peroxides with participation of oxygen-containing functional groups.