A Chiron approach to the synthesis of enantiomeric oxabicyclic adducts 16 and 32 has been developed employing an intramolecular [5+2] cycloaddition of 3-oxidopyrylium with unsaturated sugars.
已经开发了一种Chiron合成对映体氧双环加合物16和32的方法,该方法采用了3-氧化
吡啶与不饱和糖的分子内[5 + 2]环加成。