Synthesis of α,β-Unsaturated Ketones by Pd-Catalyzed Decarboxylative Allylation of α-Oxocarboxylates
作者:Nuria Rodríguez、Filipe Manjolinho、Matthias F. Grünberg、Lukas J. Gooßen
DOI:10.1002/chem.201102584
日期:2011.12.2
A palladium/p‐tolylphosphine system has been developed that catalyzes the extrusion of carbon dioxide from α‐oxocarboxylic acid allyl esters, leading to α,β‐unsaturated ketones (see scheme). The palladium complex activates the substrate and mediates the carbon–carbon bond formation to give allyl ketones, and subsequent double bond shift to the α,β position. The actual decarboxylation step with formation
Synthesis of γ,δ-unsaturated quaternary α-alkylamino acids using umpolung reaction and Claisen rearrangement
作者:Isao Mizota、Katsuki Tanaka、Makoto Shimizu
DOI:10.1016/j.tetlet.2012.01.133
日期:2012.4
A new synthesis of γ,δ-unsaturated quaternary α-amino acid derivatives was developed utilizing N-alkylation and Claisen rearrangement of allyl α-iminocarboxylates.
An investigation of structure-reactivity relationships of δ-alkenyl oximes; competitive thermal reactions leading to cyclic nitrones and/or N-unsubstituted bicyclic isoxazolidines
作者:Linda Doyle、Frances Heaney
DOI:10.1016/j.tet.2010.06.005
日期:2010.8
Thermal reactions of C-aryl δ-alkenyl oximes give N-unsubstituted bicylic lactone, lactam and pyrrolidine fusedisoxazolidines by an intramolecular oxime olefin cycloaddition pathway (IOOC) and/or cyclic nitrones by an azaprotio cyclotransfer (APT) route; a number of factors, including the nature of the aryl group, the oxime geometry and the structure of the linker between the oxime and the terminal