Cyclopropyl‐Boron Compounds as Versatile Synthetic Linchpins: Catalytic, Radical, and Base‐Mediated Approaches

Cyclopropyl‐boron skeletons have emerged as powerful synthetic intermediates due to their structural compactness, unique reactivity, and broad utility in modern molecular construction. This review highlights the major radical, catalytic, and base‐mediated strategies that enable the selective formation of Boryl‐tethered cyclopropanes from alkenes, alkynes, and cyclopropenes. Key developments across metal carbenoid transfer, hydroborylation, C–H borylation, and intramolecular substitution pathways are critically evaluated through mechanistic and stereochemical insight. Recent advances in asymmetric catalysis, carbonylative cyclopropanation, and photochemical approaches are elaborated for their contributions towards expanding substrate scope and functional diversity. Together, these methodologies define a rapidly growing toolbox that increasingly supports the streamlined synthesis of complex, medicinally relevant cyclopropyl‐boron motifs.