Synthesis of Pyrido[1,2-b]indazoles via Aryne [3 + 2] Cycloaddition withN-Tosylpyridinium Imides
The Journal of Organic Chemistry2011Vol. 76(16), pp. 6837–6843
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Jingjing Zhao, Chunrui Wu, Pan Li, Wenying Ai, Hongli Chen, Chaojie Wang, Richard C. Larock, Feng Shi
Abstract
The [3 + 2] cycloaddition of arynes with N-tosylpyridinium imides, followed by an elimination of Ts(-), affords pyrido[1,2-b]indazoles under mild reaction conditions in good yields.
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