Direct hydroperoxygenation of conjugated olefins catalyzed by cobalt(II) porphyrin

A novel and direct synthesis of hydroperoxy compounds from various types of conjugated olefins was established via cobalt(II) porphyrin-catalyzed hydr operoxygenation. The reaction of alpha,beta,gamma,delta-unsaturated carbony l compounds, acrylic esters, alpha-substituted acrylic esters and styrene d erivatives with molecular oxygen and triethylsilane in the presence of a ca talytic amount of cobalt(II) porphyrin proceeded rapidly to give the corres ponding hydroperoxygenated compounds in high or moderate yields.