Z-allylsilanes 1 are epoxidized by V5+/TBHP with high erythro-selectivity (up to 97:3) . HF- or TBAF-induced fragmentation leads to syn-1,3-diols 3. Compound 3f can be transformed within two steps into a key synthon for the lactone moiety of compactin.
Z-allylsilanes 1 are epoxidized by V5+/TBHP with high erythro-selectivity (up to 97:3) . HF- or TBAF-induced fragmentation leads to syn-1,3-diols 3. Compound 3f can be transformed within two steps into a key synthon for the lactone moiety of compactin.
Stereoselective approach to trisubstituted tetrahydrofurans
作者:Peter Mohr
DOI:10.1016/s0040-4039(00)73723-3
日期:1993.9
Functionalized allylsilanes 1 undergo with acetals 2 under mild Broensted acid catalysis a transacetalization-ring closure reaction to afford in fair to good yield and high diastereoselectivity all-cis-tetrahydrofurans 3. The stereochemical outcome is independent of the double bond geometry.