Rhodium(II)-Catalyzed Intramolecular Cycloisomerizations of Methylenecyclopropanes with<i>N</i>-Sulfonyl 1,2,3-Triazoles
作者:Kai Chen、Zi-Zhong Zhu、Yong-Sheng Zhang、Xiang-Ying Tang、Min Shi
DOI:10.1002/anie.201402803
日期:2014.6.23
A novel rhodium(II)‐catalyzed tandem cycloisomerization of methylenecyclopropanes (MCPs) with N‐sulfonyl 1,2,3‐triazoles is disclosed. The reaction produces a series of highly functionalized polycyclic N heterocycles via a rhodium imino carbene intermediate. A distinct feature of this divergent synthesis is that different types of substrates control the reaction pathways. Moreover, several interesting
Dual Gold‐Catalyzed Formal Tetradehydro‐Diels–Alder Reactions for the Synthesis of Carbazoles and Indolines
作者:Hong‐Fa Wang、Shi‐Yue Wang、Tian‐Zhu Qin、Weiwei Zi
DOI:10.1002/chem.201804529
日期:2018.12.5
dual gold‐catalyzed tetradehydro‐Diels–Alderreaction for the synthesis of nitrogen‐containing aromatic heterocycles. Under the catalytic system (IPrAuNTf2/DIPEA), indolines and carbazoles as well as other N‐containing aromatic heterocycles were prepared in high yields with good functional group tolerance. Unlike the traditional thermal tetradehydro‐Diels–Alderreactions, diluted reaction concentration