Stereoselective Synthesis of Medium-Sized Cyclic Ethers: Application of <i>C</i>-Glycosylation Chemistry to Seven- to Nine-Membered Lactone-Derived Thioacetals and Their Sulfone Counterparts
作者:Yuto Suga、Haruhiko Fuwa、Makoto Sasaki
DOI:10.1021/jo4025545
日期:2014.2.21
Stereoselective synthesis of α,α′-substituted medium-sized cyclicethers has been achieved by means of nucleophilic substitution of the corresponding lactone-derived thioacetals and their sulfone counterparts. Nucleophilic substitution of medium-sized lactone-derived thioacetals could be achieved efficiently either by (i) activation with NIS/TMSOTf in the presence of allyltrimethylsilane or TMSCN or