Diastereoselective Radical 1,4-Ester Migration: Radical Cyclizations of Acyclic Esters with SmI₂.

ABSTRACT: Reductive cyclizations of carbonyl compounds, mediated by samarium(II) diiodide (SmI₂, Kagan's reagent), represent an invaluable platform to generate molecular complexity in a stereocontrolled manner. In addition to classical ketone and aldehyde substrates, recent advances in radical chemistry allow the cyclization of lactone and lactam-type substrates using SmI₂. In contrast, acyclic esters are considered to be unreactive to SmI₂ and their participation in reductive cyclizations is unprecedented. Here, we report a diastereoselective radical 1,4-ester migration process, mediated by SmI₂, that delivers stereodefined alkene hydrocarboxylation products via radical cyclization of acyclic ester groups in α-carbomethoxy δ-lactones. Isotopic labeling ex

SUBMITTER: Morrill C 

PROVIDER: S-EPMC9377304 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature