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
Cu(I)-Catalyzed Coupling and Cycloisomerization of Diazo Compounds with Terminal Yne-Alkylidenecyclopropanes: Synthesis of Functionalized Cyclopenta[<i>b</i>]naphthalene Derivatives
作者:Peng-Hua Li、Liu-Zhu Yu、Xiao-Yu Zhang、Min Shi
DOI:10.1021/acs.orglett.8b01812
日期:2018.8.3
cycloisomerization of diazo compounds with terminal yne-alkylidenecyclopropanes (ACPs) has been presented. This reaction starts from the formation of an allenic intermediate in the Cu(I)-catalyzed cross-coupling reaction of a diazo compound with terminalalkyne in yne-tethered ACP and then undergoes a domino cycloisomerization of a 6π-electrocyclization and cyclopropane ring-opening rearrangement to give functionalized
提出了Cu(I)催化重氮化合物与末端炔基-亚烷基亚环丙烷(ACP)的偶联和环异构化。该反应从在重氮系ACP的重氮化合物与末端炔烃的Cu(I)催化的交叉偶联反应中形成烯丙基中间体开始,然后经历6π电环化和环丙烷开环的多米诺环异构化在温和的条件下重排得到中等至极好的收率的官能化的环戊[ b ]萘衍生物。