Mechanistic Insights into the Ru(II)-Catalyzed Intramolecular Formal [3 + 2] Cycloaddition of (<i>E</i>)-1,6-Enynes
作者:Rui Liu、Yajie Chou、Bing Lian、De-cai Fang、Ming Gao、Tanyu Cheng、Guohua Liu
DOI:10.1021/acs.orglett.9b02446
日期:2019.9.6
challenge in organic chemistry. Herein, we report a Ru(II)-catalyzed formal [3 + 2] cycloaddition as an efficient method to prepare unprecedented bicyclo[3.3.0]octenes from readily available (E)-1,6-enynes. Mechanistic studies based on the deuterium labeling experiments and the DFT calculation disclose a reasonable mechanistic pathway, where a ruthenacyclopentene generated by an ene-yne oxidative cyclization