Catalytic Asymmetric Synthesis of 2,2-Disubstituted Oxetanes from Ketones by Using a One-Pot Sequential Addition of Sulfur Ylide
作者:Toshihiko Sone、Gang Lu、Shigeki Matsunaga、Masakatsu Shibasaki
DOI:10.1002/anie.200805473
日期:——
Better the second time around: The title compounds were synthesized by using a one‐pot double methylene transfer catalyzed by a heterobimetallic La/Li complex. Chiral amplification in the second step was the key to obtaining oxetanes in high enantiomeric excess (see scheme).
第二次更好:标题化合物是通过异双金属La / Li络合物催化的一锅法双亚甲基转移合成的。第二步中的手性扩增是获得高对映体过量的氧杂环丁烷的关键(参见方案)。