Iodine(III)-Promoted Ring Expansion of 1-Vinylcycloalkanol Derivatives: A Metal-Free Approach toward Seven-Membered Rings
作者:Luiz F. Silva,、Ramon S. Vasconcelos、Mário A. Nogueira
DOI:10.1021/ol800048f
日期:2008.3.1
A versatile and metal-free approach for the synthesis of molecules bearing seven- and eight-membered rings is described. The strategy is based on the ringexpansion of 1-vinylcycloalkanols (or the corresponding silyl or methyl ether) mediated by the hypervalent iodine reagent HTIB (PhI(OH)OTs). The reaction condition can be easily adjusted to give seven-membered rings bearing different functional groups