Rhodium(I)-catalyzed [3+2] intramolecular cycloaddition of alkylidenecyclopropane–propargylic esters
作者:Di-Han Zhang、Min Shi
DOI:10.1016/j.tetlet.2011.11.084
日期:2012.2
An interesting rhodium(I)-catalyzed [3+2] intramolecular cycloaddition of alkylidenecyclopropanes 1 containing propargylic esters has been described in this context. A variety of bicyclo[3.3.0]octene derivatives were obtained in moderate to good yields under mild conditions. The alkylidenecyclopropane-enynes 2 could be also converted to the corresponding cycloadducts 3 in good yields.
Co‐Catalyzed Asymmetric Intramolecular [3+2] Cycloaddition of Yne‐Alkylidenecyclopropanes and its Reaction Mechanism
作者:Xiong Xiao、Zhi‐Xiang Yu
DOI:10.1002/chem.202100426
日期:2021.4.26
new transition metal‐catalyzed asymmetric cycloadditions for the synthesis of five‐membered carbocycles (FMCs) is a research frontier in reaction development due to the ubiquitous presence of chiral FMCs in various functional molecules. Reported here is our discovery of a highly enantioselective intramolecular [3+2] cycloaddition of yne‐alkylidenecyclopropanes (yne‐ACPs) to bicyclo[3.3.0]octadiene and