Novel oxidative routes to N-arylpyridoindazolium salts
Oleg A Levitskiy1, Yuri K Grishin1, Tatiana V Magdesieva1
1Chemistry Department, Lomonosov Moscow State University, Leninskie Gory, 1/3, Moscow, 119234, Russia.
Abstract:
A novel facile approach to N-arylpyridoindazolium salts is proposed, based on direct oxidation of the ortho-pyridine substituted diarylamines, either using bis(trifluoroacetoxy)iodobenzene as an oxidant, or electrochemically, via potentiostatic oxidation. Electrochemical synthesis occurs under mild conditions; no chemical reagents are required except electric current. Both approaches can be considered as a late-stage functionalization; easily available ortho-pyridyl-substituted diarylamines are used as the precursors.
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