Linear‐Selective Allylation of Aldehydes with Simple Alkenes Mediated by Quadruple Hybrid Catalysis

Abstract In this study, we developed a linear‐selective allylation reaction of aldehydes using simple alkenes as starting materials by using a quadruple hybrid catalyst system. The reaction proceeded under mild conditions such as room temperature under visible light irradiation and was applicable to asymmetric reactions. The key for this reaction is the addition of Ni(BF 4 ) 2 ⋅ 6H 2 O catalyst to the previously reported ternary catalyst system, accelerating the allylic transfer process from branch products to thermodynamically stable linear products by increasing the Brønsted acidity of thiophosphoric imide (TPI) catalyst. magnified image