CeCl<sub>3</sub>·7H<sub>2</sub>O−NaI Catalyzed Hydrooxacyclization of Unsaturated 3-Hydroxy Esters
作者:Emanuela Marotta、Elisabetta Foresti、Tommaso Marcelli、Francesca Peri、Paolo Righi、Noemi Scardovi、Goffredo Rosini
DOI:10.1021/ol026955z
日期:2002.12.1
[GRAPHICS]Cerium(III) chloride heptahydrate and sodium iodide in boiling acetonitrile promote cyclization of 3-hydroxyalkenoic acids esters giving 5-substituted tetrahydrofuranacetic acid esters and 6-substituted tetrahydropyranacetic acid esters in fair to good yield and with complete retention of the absolute configuration of the starting 3-hydroxy ester.