Nan Xing Hu

Novel oxidizing properties of p-methoxybenzenetellurinic acid anhydride

Abstract The title compound has proved to be a mild oxidizing agent like the corresponding telluroxide or tellurone towards thiol, phosphine, thioamide, thiourea, thionoester, and benzylic alcohol. In addition, it serves as a selective catalyst for the hydration of terminal alkyne.

Cyclofunctionalization of hydroxyolefins induced by arenetellurinic anhydride

Abstract Arenetellurinic anhydride reacts with hydroxyolefins in acetic acid at reflux to give cyclic ethers bearing a phenyltelluro group. A mechanism via intramolecular oxytellurinylation with arenetellurinyl acetate is proposed.

NEW SYNTHETIC REACTIONS USING ARENETELLURINIC ANHYDRIDES

Abstract New synthetic reactions utilizing arenetellurinic acid anhydrides are described. The anhydrides proved to be very useful reagents for the transformation of various functional groups. Furthermore they induced various intramolecular cyclofunctionalizations to yield many oxygen and nitrogen heterocycles.

Organotelluriums. Part 21. Amidotellurinylation of olefins and a novel one-pot synthesis of 4,5-dihydro-oxazoles from olefins

Benezenetellurinyl trifluoroacetate in the presence of boron trifluoride–diethyl ether effects ready amidotellurinylation of olefins in acetonitrile at room temperature. The resulting β-acetamidoalkyl phenyl telluroxides further suffer an in situ intramolecular substitution at 75 °C to give 4,5-dihydrooxazoles in high yields. These reactions are highly regio- and stereo-selective.