Synthesis of Spirocyclic Ethers by Enantioselective Copper-Catalyzed Carboetherification of Alkenols
作者:Shuklendu D. Karyakarte、Chanchamnan Um、Ilyas A. Berhane、Sherry R. Chemler
DOI:10.1002/anie.201808554
日期:2018.9.24
6‐ and 6,6‐spirocyclic products containing fully substituted chiral carbon centers with up to 99 % enantiomeric excess. This reaction features the formation of two rings from acyclic substrates, 1,1‐disubstituted alkenols functionalized with either arenes, alkenes, or alkynes, and clearly constitutes a powerful way to synthesize chiral spirocyclic ethers.
螺环醚可以在生物活性化合物中找到。这种铜催化的对映选择性烯烃碳醚化提供了5,5,5,6,6,6,6螺环产物,其中含有完全取代的手性碳中心,对映体过量高达99%。该反应的特征是由无环底物形成两个环,被芳烃,烯烃或炔烃官能化的1,1-二取代的烯醇,显然构成了合成手性螺环醚的有效方法。