Synthesis of Bifunctional Allylic Compounds by Using Cyclopropenes as Functionalized Allyl Equivalents
作者:Sergio Mata、Luis A. López、Rubén Vicente
DOI:10.1002/anie.201806961
日期:2018.8.27
The synthesis of uncommon bifunctional allylic derivatives bearing a silane and an alcohol within the same allylic framework is reported. This method relies on the coupling of hydrosilanes with substituted and functionalized cyclopropenes, which deliver the allyl fragment. Rhodium(II) catalysts provide regioselective access to vinyl carbene intermediates, which easily undergo Si−H bond insertions.
Rhodium(III)‐Catalyzed Enantio‐ and Diastereoselective C−H Cyclopropylation of N‐Phenoxylsulfonamides: Combined Experimental and Computational Studies
作者:Guangfan Zheng、Zhi Zhou、Guoxun Zhu、Shuailei Zhai、Huiying Xu、Xujing Duan、Wei Yi、Xingwei Li
DOI:10.1002/anie.201913794
日期:2020.2.10
Cyclopropane rings are a prominent structural motif in biologically active molecules. Enantio- and diastereoselective construction of cyclopropanes through C-H activation of arenes and coupling with readily available cyclopropenes is highly appealing but remains a challenge. A dual directing-group-assisted C-H activation strategy was used to realize mild and redox-neutral RhIII -catalyzed C-H activation