Palladium-catalyzed cascade carboesterification of norbornene with alkynes
作者:Wanqing Wu、Can Li、Jianxiao Li、Huanfeng Jiang
DOI:10.1039/c8ob01799a
日期:——
An efficient and convenient palladium-catalyzed cascade carboesterification of norbornenes (NBE) with alkynes has been accomplished to afford functionalized α-methylene γ-lactone and tetrahydrofuran derivatives in good to excellent yields. This new strategy exhibits excellent atom- and step-economy, good functional group tolerance and broad substrate scope. In particular, NBE-palladium species was
A novel palladium-catalyzed, one-pot, four-step cascademethod has been developed to afford functionalized gamma-lactones in moderate to good yields. This novel and general methodology represents a rare instance of carbonylation of the C(sp(3))-palladium bond.
A simple and efficient synthesis of cyclopentadienones via palladium-catalyzed cyclocarbonylation of alkynes under atmosphericpressure of carbonmonoxide has been developed. The transformation was carried out under mild and ligand-free conditions, a wide range of substrates and exceptional functional group tolerance.
A novel Pd-catalyzed/Cu-mediated oxidativecyclization has been developed for the synthesis of trisubstituted oxazoles, which is thought to proceed through cascade formation of C-N and C-O bonds. In this protocol, four hydrogen atoms were removed and water was used as the oxygen atom source.
form cyclopentene spiro-rhodanine scaffolds are described. In the first approach, alkynoate derivatives and 5-arylidene-3-(tert-butyl)-2-thioxothiazolidin-4-one react in the presence of PBu3 through a [3+2]...