Multicomponent Prins Cyclization from Allylsilyl Alcohols Leading to Dioxaspirodecanes
作者:Asunción Barbero、Alberto Diez-Varga、Francisco J. Pulido
DOI:10.1021/ol402425u
日期:2013.10.18
A multicomponent reaction for the preparation of dioxaspirodecanes starting from allylsilyl alcohols was achieved. The one-pot sequence involves the sequential acid-catalyzed reaction of an allylsilyl alcohol with an aldehyde to afford an alkenediol. The subsequent Prins cyclization of the homoallylic alcohol moiety generates a tetrahydropyranyl carbocation which is intramolecularly trapped by the second hydroxyl group. The chemoselectivity of the process shows dependence on the nature of the aldehyde and the concentration of the catalyst.