Allylation of the radical generated from alpha-silyl-alpha-phenylselenoacetic esters with various allyltributyltin substrates led to good yields of the corresponding homoallylsilanes. A study on the nature of the radical thus generated was performed using comparative allylation rates with electronically different allyltributyltin compounds. Finally, these homoallylsilanes were converted into the corresponding homoallylic-1,2-diols after reduction of the ester function and oxidation of the C-Si bond.
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.