With the optimized reaction conditions in hands, we explored the reaction scope of allyl carboxylates, as summarized in Table . A diverse array of substituted allyl carboxylates, including both cyclic and linear frameworks, reacted smoothly, delivering the corresponding products 2a-2r in satisfactory yields ranging from 56% to 91%. Substrates featuring cyclic ether and thioether moieties (2a & 2b), diverse cyclic ring systems including 5, 6, and 12-membered rings (2c-2f), and those with the ethylene ketal group (2g) were compatible under the standard reaction conditions. The reaction scope can be further extended to acyclic system. For example, a dimethyl-substituted allyl carboxylate reacted smoothly, forming the arranged allyl carboxylate 2i in 80% yield. For non-symmetric allyl carboxylates, such as the methylcyclohexanyl-substituted substrate, where competition in the HAT step occurs between primary and tertiary hydrogen atoms, the Co exclusively abstracts the primary hydrogen atom, forming the kinetic, terminal alkene product 2j in excellent yield. Conversely, when HAT competes between secondary and primary hydrogen atoms, cobalt catalyst preferentially abstracts from the secondary carbon, yielding thermodynamically more stable products 2k-2r. These findings demonstrate that the CoSalen catalysts are highly sensitivity to substrate sterics. Moreover, a diverse array of functional groups, such as phenyl, chloro, bromo, siloxyl, acyloxyl, hydroxyl, ester, and phthalimide, were well-tolerated, furnishing the corresponding products 2k-2r in good to excellent yields.