Three-Step Synthesis of (Thio)xanthene and Dibenzothiepine/Dibenzoxepine by an Intramolecular Mizoroki-Heck Reaction of Diaryl (Thio)Ethers
作者:Mogens Nielsen、Tue Jepsen、Mogens Larsen、Morten Jørgensen
DOI:10.1055/s-0031-1290317
日期:2012.2
and dibenzothiepine/dibenzoxepine from readily available starting materials. The Mizoroki―Heck cyclization as the final step was optimized to afford full conversion of the corresponding diaryl (thio)ethers and furthermore to achieve reasonably good selectivity between the 6-exo and the 7-endo products.
我们提出了一种新的三步协议,用于从现成的起始材料中制备呫吨/噻吨和二苯并噻平/二苯并噻平。优化作为最后一步的 Mizoroki-Heck 环化以提供相应的二芳基(硫)醚的完全转化,并进一步在 6-exo 和 7-endo 产物之间实现合理的良好选择性。