New indium-mediated cyclisation reactions of tethered haloenynes in aqueous solvent systems
作者:Andres Goeta、Matthew M. Salter、Hummad Shah
DOI:10.1016/j.tet.2006.01.094
日期:2006.4
The intramolecular cyclisation of tethered allyl bromides onto terminal alkynes mediated by metallic indium proceeds smoothly and cleanly in mixtures of THF and H2O to give unsaturated carbocycles and heterocycles in good yield. Alternatively, the cyclisation may be carried out in anhydrous THF with the aid of acid catalysis. The reaction is also mediated by a range of indium salts and proceeds with