Photoredox chromium and cobalt dual catalysis for carbonyl allylation with butadiene via allyl radical intermediates

Here, we report an allylation reaction of aldehydes with butadiene using cobalt and chromium catalysts via a metal-hydride hydrogen atom transfer (MHAT) pathway under visible light irradiation. A variety of homoallylic alcohols can be obtained with high yield and excellent diastereoselectivity. The cheap and readily available raw materials and catalysts make the reaction system have a great potential application value.