Cobalt‐Catalyzed Intramolecular Cycloadditions of Alkenylidenecyclopropanes with Alkenes and Dienes
作者:Eduardo da Concepción、Israel Fernández、José L. Mascareñas、Fernando López
DOI:10.1002/adsc.202301040
日期:2024.2.20
applied to promote the cycloaddition of ACP 1 b, bearing a fully carbonade tether, which gave the desired bicarbocyclic adduct 2 b in 65% yield (Scheme 2). In consonance with the assumption that alkenes are more challenging partners than alkynes, substrates with substituted alkenes like 1 c–1 e (R’=Ph, Me or CO2Me) failed to give the expected cycloadducts. However, the cycloaddition of the bisalkylidenecyclopropane
Palladium-Catalyzed Intramolecular [3C+2C] Cycloaddition of Alkylidenecyclopropanes to Allenes
作者:Beatriz Trillo、Moisés Gulías、Fernando López、Luis Castedo、José L. Mascareñas
DOI:10.1002/adsc.200600347
日期:2006.11
Allenes are useful and versatile two-carbon partners in palladium catalyzed [3C+2C] intramolecularcycloadditions with alkylidenecyclopropanes enabling the preparation of dienyl bicyclo[3.3.0]octane adducts with good yields and high diastereoseletivity.