title: Gold- and iodine-mediated internal oxygen transfer of nitrone- and sulfoxide-functionalized alkynes.
abstract: Intramolecular oxygen transfer of nitrone- and sulfoxide-alkynes was achieved using a catalytic amount of Au(I) and a stoichiometric amount of iodine. The Au(I)-catalyzed cyclization of a nitrone-terminal alkyne afforded a cyclic iminoester, while cyclization of analogous nitrone-internal alkynes yielded aldehyde-enones. The I(2)-mediated cyclization of nitrone-alkynes afforded iodinated γ-lactams and the I(2)-mediated internal redox of the closely related sulfoxide-alkynes gave diketones functionalized with a thoiether.
authors: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210014, China.
authors: Dan
authors: D
authors: Chen
authors: Guoyong
authors: G
authors: Song
authors: Aiqun
authors: A
authors: Jia
authors: Xingwei
authors: X
authors: Li