Divergent synthesis of N-heterocycles by Pd-catalyzed controllable cyclization of vinylethylene carbonates
作者:Yuwen Yang、Weibo Yang
DOI:10.1039/c8cc06945j
日期:——
Here, we report a palladium-catalyzed controllable cyclization of vinyl ethylene carbonates that proceeds through formal migration [2+3] and [5+2] cycloadditions, respectively, under mild conditions.
Pd-Catalyzed Decarboxylative Cycloaddition for the Synthesis of Highly Substituted δ-Lactones and Lactams
作者:Linlin Shi、Yingdong He、Jianxian Gong、Zhen Yang
DOI:10.1021/acs.organomet.0c00646
日期:2021.2.8
An efficient palladium-catalyzed decarboxylative cycloaddition process of vinyl cyclic carbonates and vinyloxazolidinones for the synthesis of highlysubstituted δ-lactone and δ-lactam derivatives was developed. This protocol exhibits several unique characteristics, including broad substrate scope, good functional group tolerance, and operational convenience, which enables a regioselective access to
Stereoselective Pd-Catalyzed Decarboxylative Allylation: Assembly of Highly Functionalized Allylic Amines Bearing a Quaternary Center
作者:Linlin Shi、Yingdong He、Yuanyuan Chang、Nan Zheng、Zhen Yang、Jianxian Gong
DOI:10.1021/acs.orglett.9b00673
日期:2019.5.3
Here, we report a practical and reliable methodology to direct construction of tri- and tetrasubstituted olefins bearing an allylicamine, with the concomitant construction of the sterically congested quaternary stereocenter through stereoselective palladium-catalyzed cascade decarboxylation of vinyloxazolidinones.
Multiple Absolute Stereocontrol in Pd-Catalyzed [3+2] Cycloaddition of Oxazolidinones and Trisubstituted Alkenes Using Chiral Ammonium–Phosphine Hybrid Ligands
The development of a Pd-catalyzed highly enantio- and diastereoselective [3+2] cycloaddition of 5-vinyloxazolidinones and activated trisubstituted alkenes is described in detail. This protocol for ...
Ligand-enabled multiple absolute stereocontrol in metal-catalysed cycloaddition for construction of contiguous all-carbon quaternary stereocentres
作者:Kohsuke Ohmatsu、Naomichi Imagawa、Takashi Ooi
DOI:10.1038/nchem.1796
日期:2014.1
The development of a general catalytic method for the direct and stereoselective construction of contiguous all-carbon quaternary stereocentres remains a formidable challenge in chemical synthesis. Here, we report a highly enantio- and diastereoselective [3+2] annulation reaction of 5-vinyloxazolidinones and activated trisubstituted alkenes catalysed by a palladium complex bearing a newly devised phosphine