Tris(oxazoline)/copper-catalyzed coupling of alkynes with nitrones: a highly enantioselective access to β-lactams

Jiang-Hua Chen, Sai-Hu Liao, Xiu-Li Sun, Qi Shen, Yong Tang

Tetrahedron

Volume 68, Issue 25, 24 June 2012, Pages 5042–5045

http://dx.doi.org/10.1016/j.tet.2012.04.049