Rhodium‐Catalyzed Spirocyclic Sultam Synthesis by [3+2] Annulation with Cyclic
<i>N</i>
‐Sulfonyl Ketimines and Alkynes
作者:Lin Dong、Chuan‐Hua Qu、Ji‐Rong Huang、Wei Zhang、Qian‐Ru Zhang、Jin‐Gen Deng
DOI:10.1002/chem.201303372
日期:2013.12.2
Atom‐economical addition: RhIII‐catalyzed “Grignard‐type” cyclization between cyclic N‐sulfonyl ketimines and internal alkynes has been developed to afford multifunctional spirocyclic sultam products in high yields (up to 99 %) under mild conditions (see scheme, Cp* = pentamethylcyclopentadienyl, DCE = 1,2‐dichloroethane).
Continuous Flow Chemistry Synthesis of Spirocyclic Sultams and Isoquinolines through Rhodium‐Catalyzed C−H Activation.
作者:Ting Zheng、Meng‐Ling Lin、Lin Dong
DOI:10.1002/ejoc.202201170
日期:2022.12.19
Continuousflow technology has been applied to C−H activation to improve reaction efficiency. Various imines and alkynes have been smoothly applied to continuousflow system, and the spirocyclic sultams and isoquinolines can be obtained in excellent yields in a relatively short time via [3+2] or [4+2] annulation reactions.
Cp*Co<sup>III</sup>-Catalyzed C–H Alkenylation/Annulation to Afford Spiro Indenyl Benzosultam
作者:Hui Liu、Jie Li、Miao Xiong、Jijun Jiang、Jun Wang
DOI:10.1021/acs.joc.6b00976
日期:2016.7.15
Cp*Co-III-catalyzed tandem inert C-H alkenylation/annulation of N-sulfonyl ketimines with alkynes is revealed. A series of spiro indenyl benzosultams were facilely prepared in good yields under mild reaction conditions.