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[3 + 3] Cycloaddition of in Situ Formed Azaoxyallyl Cations with 2‑Alkenylindoles: An Approach to Tetrahydro-β-carbolinones

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posted on 09.05.2017, 18:09 by Kaifan Zhang, Xiaoying Xu, Jiuan Zheng, Hequan Yao, Yue Huang, Aijun Lin
A novel [3 + 3] cycloaddition between in situ formed azaoxyallyl cations and 2-alkenylindoles has been developed. This concise method allows the efficient construction of a series of tetrahydro-β-carbolinones in good yields under mild conditions. Gram-scale experiments and further derivatization of tetrahydro-β-carbolinones highlighted the potential utility of our method.