Oxidative cyclization of tertiary pentenol derivatives forming 2,5,5-trisubstituted THF rings and the total synthesis of cyclocapitelline
作者:Geoffrey A. Phillips、Cory Palmer、Andrew C. Stevens、Mathew L. Piotrowski、Daryl S.R. Dekruyf、Brian L. Pagenkopf
DOI:10.1016/j.tetlet.2015.09.064
日期:2015.10
The synthesis of 2,5,5-trisubstituted tetrahydrofuran rings was accomplished via the Mukaiyama aerobic oxidative cyclization of tertiary 5-pentenols employing the Co(nmp)2 catalyst. A variety of THFs were formed in moderate to good yield and diastereoselectivity. The method developed herein was successfully applied to an enantioselective total synthesis of cyclocapitelline.
2,5,5-三取代的四氢呋喃环的合成是通过使用Co(nmp)2催化剂对5-戊烯叔叔醇进行Mukaiyama有氧氧化环化来完成的。以中等至良好的产率和非对映选择性形成了各种THF。本文开发的方法已成功地应用于环己内酯的对映选择性全合成。