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1. Synthesis of Tribenzo[b,e,g]phosphindole Oxides via Radical Bicyclization Cascades of o-Arylalkynylanilines.

Author

Jie Li, Wen-Wen Zhang, Xiao-Jing Wei, Wen-Juan Hao, Guigen Li, Shu-Jiang Tu, and Bo Jiang

Subjects
*OXYGEN compounds, *CHEMICALS, *OXIDES, *CARBON, *BICYCLIC compounds, *INDOLE compounds
Abstract

A new DTBP/Mg(NO3)2-mediated bicyclization cascade of o-arylalkynylanilines with secondary arylphosphine oxides has been developed, enabling dual C(sp2)-H functionalization along with the cleavage of the C-N bond. The combination between regioselective P-centered radical-triggered [3 + 2] cyclization and C-centered radical-induced cross-coupling in a one-pot manner delivered 27 examples of tribenzo[b,e,g]phosphindole oxides with generally high regioselectivity. A reasonable mechanism for forming such products involving radical addition-cyclization cascade is proposed. [ABSTRACT FROM AUTHOR]

Published
2017
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