An asymmetric alkylation-ring-closing metathesis strat- egy was developed for the construction of a,a'-disubstituted medi- um ring ethers. The approach features an asymmetric alkylation of highly functionalized a-alkoxy acyl oxazolidinones followed by ring closure effected by Grubbs ' ruthenium catalyst. The relation- ship between diene conformation and the rate of ring-closure was examined.
一种不对称的烷基化闭环复分解策略被开发用于构建 a,a'-二取代的中
环醚。该方法的特点是高度官能化的α-烷氧基酰基
恶唑烷酮的不对称烷基化,然后在 Grubbs 的
钌催化剂的作用下进行闭环。研究了二烯构象与闭环率之间的关系。