Da Concepción, EduardoFernández, IsraelMascareñas Cid, José LuisLópez García, Fernando2024-02-162024-02-162023Advanced Synthesis & Catalysis (ASC).http://hdl.handle.net/10347/32851Low-valent cobalt complexes equipped with phosphorous type of ligands can promote the intramolecular (3+2) cycloaddition of alkylidenecyclopropanes (ACPs) with alkenes and with allenes. Dienes can also be used as partners, but they afford seven-membered cycloadducts. The reactions are fully diastereoselective and, in some cases, we also observed moderate enantioselectivities, especially when using chiral phosphite ligands.eng© 2023 The Authors. Advanced Synthesis & Catalysis published by Wiley-VCHGmbH.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs LicenseAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/CobaltAlkylidenecyclopropaneCycloadditionAlleneDienejournal article10.1002/adsc.2023010401615-4169open access