Organoselenium-induced cyclizations in organic synthesis
作者:K.C. Nicolaou
DOI:10.1016/s0040-4020(01)93285-5
日期:——
A number of organoselenium reagents are introduced as efficient initiators of ringclosures leading from unsaturated substrates to lactones, cyclicethers, cyclic thioethers, N-heterocycles and carbocycles. These cyclizations often proceed with high ring selectivity and stereoselectivity and are accompanied by the incorporation of the phenylseleno group (PhSe) into the final product. Methods are described
Ammonium Iodide Catalyzed Selenolactonization of Unsaturated Acids
作者:Jie Yan、Hongwei Shi、Chen Yu、Min Zhu
DOI:10.1055/s-0035-1560348
日期:——
A convenient procedure is developed for the preparation of selenolactones from unsaturated acids and diselenides using a catalytic amount of ammonium iodide in combination with m-chloroperoxybenzoic acid as the oxidant. This catalytic ring-closing method proceeds efficiently at room temperature under neutral conditions, and in short reaction times, to afford the corresponding selenolactones in good yields. Using the same reaction conditions, cyclic selenoethers and tellurocyclization products are prepared, thus extending the catalytic application of inorganic iodides in organic synthesis.
NICOLAOU K. C.; SEITZ S. P.; SIPIO W. J.; BLOUNT J. F., J. AMER. CHEM. SOC., 1979, 101, NO 14, 3884-3893
作者:NICOLAOU K. C.、 SEITZ S. P.、 SIPIO W. J.、 BLOUNT J. F.
DOI:——
日期:——
NICOLAOU, K. C., TETRAHEDRON, 1981, 37, N 23, 4097-4109