TBAB-mediated radical 6-endo-trig ortho-cyclization of N-aryl-N-(prop-2-yn-1-yl)benzenesulfonamide for the synthesis of 3-bromo-1,2-dihydroquinoline
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Add time:07/12/2019 Source:sciencedirect.com
In this work, we described a new synthetic route of 3-bromo-1,2-dihydroquinoline derivatives based on the TBAB/Oxone-mediated radical 6-endo-trig ortho-cyclization of 2-alkynylbenzamide. The reaction proceeded smoothly with moderate functional group tolerance and high reaction efficiency. It is believed that radical addition, 6-endo-dig cyclization, and oxidation are all involved in the reaction processes. Furthermore, we successfully demonstrated the usability of these derivatives in further functionalization.
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