A novel chloropalladation-initiated intermolecular oxyvinylcyclization of alkenes with alkynoic acids or alkynols is developed. This protocol provides a series of 3-methylene γ-lactone and tetrahydrofuran derivatives in moderate to excellent yields with high stereoselectivities in the presence of PdCl2 and CuCl2 or CuCl2·2H2O. Besides a broad substrate scope, this method has the advantages of mild
Palladium-catalyzed cross-coupling of terminal alkynes with di-tert-butyl dicarbonate: Facile access to functionalized alkynoate esters
作者:Jing-Hui Liu、Yao-Wei Liu、Chuang Geng、Bin Zhao、Guo-Qin Hu
DOI:10.1016/j.tet.2023.133418
日期:2023.6
An efficientpalladium-catalyzed alkoxycarbonylation of terminalalkynes was developed using di-tert-butyl dicarbonate as the ester source. This protocol proceeded under mild conditions and exhibited a board substrate scope. The successful application of gram-scale synthesis and product derivatization further confirmed the synthetic utility of this method. Thus it provides a powerful route to the synthesis