Radical Cascade Reactions of β,γ‐Unsaturated Hydrazones/Oximes
Ya‐Feng Si, Qi‐Yan Lv, Bing Yu
Abstract
Abstract Radical cascade cyclization of β,γ‐unsaturated hydrazones/oximes has recently emerged as an efficient and powerful protocol for the construction of diverse and valuable functionalized pyrazolines and isoxazolines. In this review, three catalytic ways of radical cascade cyclization of β,γ‐unsaturated hydrazones/oximes are summarized and classified; these are transition‐metal‐catalyzed systems, transition‐metal‐free systems, and photo‐/electrocatalytic systems, respectively. Through these methods, various functional groups are installed on the pyrazoline and isoxazoline skeletons to enrich the small organic molecule library. magnified image
Topics & Concepts
ChemistryCascadeRadical cyclizationCatalysisPyrazolineTransition metalCombinatorial chemistryCascade reactionOrganic chemistryChromatographyRadical Photochemical ReactionsCatalytic C–H Functionalization MethodsSulfur-Based Synthesis Techniques