Highly stereoselective access to 2,4- and 2,4,5-substituted tetrahydrofurans from α-silylacetic esters. A study of homoallylic stereocontrol.
作者:Olivier Andrey、Yannick Landais
DOI:10.1016/s0040-4039(00)61352-7
日期:1993.1
Cis-2,4- and cis-cis-2,4,5-substituted tetrahydrofurans have been prepared stereoselectively using electrophile-mediated cyclization of beta-hydroxyhomoallylsilanes, readily available from alpha-silylacetic esters.
1,3-Asymmetric induction in electrophilic addition onto homoallylsilanes. An approach towards the total synthesis of (+/−)-kumausyne
diastereoselectivities. With disubstituted homoallylsilanes, tetrahydrofurans having acyclic chiral centres were also obtained. An application of this methodology to an approach towards the totalsynthesis of (+/−)-kumausyne is proposed on the basis of these preliminary results. The four chiral centres of this marine natural product have been set up with excellent diastereoselectivities.