Fascinating reactivity in gold catalysis: synthesis of oxetenes through rare 4-exo-dig allene cyclization and infrequent β-hydride elimination
作者:Benito Alcaide、Pedro Almendros、Teresa Martínez del Campo、Israel Fernández
DOI:10.1039/c1cc13212a
日期:——
A novel reactivity in gold catalysis, namely the unusual preference for the 4-exo-dig cyclization in allene chemistry as well as the rare β-hydride elimination reaction, was uncovered starting from readily available allenols.
Platinum-Catalyzed Divergent Reactivity of α-Hydroxyallenes: Synthesis of Dihydrofurans and α,β-Unsaturated Ketones
作者:Benito Alcaide、Pedro Almendros、Israel Fernández、Teresa Martínez del Campo、Teresa Naranjo
DOI:10.1002/adsc.201300413
日期:2013.9.16
α‐Allenols were catalytically transformed into dihydrofurans in the presence of platinum dichloride. Notably, using platinum dichloride along with silver triflate as the catalytic system, α,β‐unsaturated ketones were obtained. Therefore, the role of the silver salt may not just consist in the activation of the platinum precatalyst.