Gold-Catalyzed Oxidative Reactions of Propargylic Carbonates Involving 1,2-Carbonate Migration: Stereoselective Synthesis of Functionalized Alkenes
Ning Sun, Ming Chen and Yuanhong Liu*
*State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China, Email: yhliumail.sioc.ac.cn
N. Sun, M. Chen, Y. Liu, J. Org. Chem., 2014, 79, 4055-4067.
DOI: 10.1021/jo500573s (free Supporting Information)
see article for more reactions
A gold-catalyzed oxidative reaction of propargylic carbonates or acetates using 3,5-dichloropyridine as the oxidant provides efficient access to α-functionalized-α,β-unsaturated ketones with excellent regio- and diastereocontrol. In addition, these alkene products could be further transformed into valuable 5-hydroxycyclopent-2-enones via cyclocondensation with acetone or cyclodimerization under basic conditions.
see article for more examples