Oxidative Addition of Dimethyl Malonate to Styrenes Mediated by Cerium(Iv) Ammonium Nitrate: Some Novel Observations
作者:Vijay Nair、Jessy Mathew、Latha G. Nair
DOI:10.1080/00397919708005011
日期:1997.9
The oxidative addition of dimethylmalonate to ring substituted styrenes leads to the formation of substituted dimethyl (2-oxo-2-phenylethyl) malonate and methyl 2-oxo-5-phenyltetrahydrofuran-3-carboxylate along with small amounts of substituted dimethyl [2-(nitrooxy)-2-phenylethyl] malonate and dimethyl 2-methoxy-2-phenylethyl) malonate. A tentative mechanism which supports the formation of these
TBAI/TBHP-Promoted Generation of Malonyl Radicals: Oxidative Coupling with Styrenes Leads to γ-Keto Diesters
作者:Soumyadeep Roy Chowdhury、Injamam Ul Hoque、Soumitra Maity
DOI:10.1002/asia.201800992
日期:2018.10.4
A metal‐free protocol for oxidative coupling of malonicesters with styrenes to form γ‐keto diesters has been developed. Key to the success of this process is the generation of malonyl radicals from unfunctionalized malonicesters under organo‐catalysis conditions with TBAI and TBHP. This process tolerates both terminal and internal olefins with diverse malonicesters. It provides a new green metal‐free
In this paper, we designed and synthesized 4-vinyl-4-butyrolactone as a precursor to generate the zwitterionicallylpalladiumintermediates, which behaved as five-membered all-carbon synthon in palladium-catalyzed (5+3) annulation with azomethineimines, giving eight-membered ring-fused heterocycles (26 examples, 49% to 97% yield, >20:1 dr).