Rh( I )配合物催化烯-亚乙烯基环丙烷的二聚反应顺利进行,构建了一系列操作步骤简单、反应条件温和、官能团耐受性好的螺[4,5]癸烷骨架产物。在本文中,实验和计算研究相结合,揭示了反离子辅助的 Rh( I )–Rh( III )–Rh( V )–Rh( III )–Rh( I) 涉及串联氧化环金属化/还原消除/选择性氧化加成/选择性还原消除/还原消除步骤的催化循环;此外,通过DFT计算,确定了五价螺铑中间体是该二聚反应的关键中间体。
Palladium-Initiated Radical Cascade Stereoselective Iodofluoroalkylation/Cycloisomerization of Ene-vinylidenecyclopropanes
作者:Song Yang、Qin Xu、Min Shi
DOI:10.1002/chem.201601625
日期:2016.7.18
A novel and convenient palladium‐initiated radical cascade stereoselective iodofluoroalkylation/cycloisomerization of ene‐vinylidenecyclopropanes with fluoroalkyl iodides has been developed. The reaction proceeds under mild reaction conditions with high atom economy and stereoselectivity, thereby allowing an efficient access to a variety of difluoromethylated or perfluoroalkylated pyrrolidines tethered
Construction of pyrroles, furans and thiophenes <i>via</i> intramolecular cascade desulfonylative/dehydrogenative cyclization of vinylidenecyclopropanes induced by NXS (X = I or Br)
作者:Zhe Meng、Jun Yan、Chao Ning、Min Shi、Yin Wei
DOI:10.1039/d3sc01542d
日期:——
Pyrroles, furans, and thiophenes are important structural motifs in biologically active substances, pharmaceuticals and functional materials. In this paper, we disclose an efficient synthetic strategy for the rapid construction of multisubstituted pyrroles, furans, and thiophenes via NXS mediated desulfonylative/dehydrogenative cyclization of vinylidenecyclopropanes (VDCPs). The advantages of this