Tin(IV) triflimidate-catalyzed cyclization of epoxy esters to functionalized δ-hydroxy-γ-lactones
作者:Sylvain Antoniotti、Elisabet Duñach
DOI:10.1016/j.tetlet.2009.03.055
日期:2009.5
In the presence of 5 mol % of tin(IV) triflimidate, a cyclization reaction of epoxyesters to delta-hydroxy-gamma-lactones proceeding in 46-98% yields without additives, ligands, or co-catalysts was observed. The cyclization to five-membered rings is greatly favored compared to the possible six-membered rings formation and is probably under the control of a Thorpe-Ingold type effect. (C) 2009 Elsevier Ltd. All rights reserved.