Abstract
AbstractA catalytic and step economic protocol for the construction of N‐2‐aryl‐naphthotriazoles via copper‐catalyzed cyclization of aryl amines and aryldiazonium salts is reported. With dioxygen in the air as termial oxidants under copper catalysis, various N‐2‐aryl‐naphthotriazoles were synthesized in high yields. Importantly, this protocol features the sufficient inhibition of the classic C‐N2 bond cleavage process of aryldiazonium tetrafluoroborates under copper catalysis and the undesired dehydrogenative coupling of aryl amines under oxidative conditions. Preliminary mechanistic studies indicated that a radical procedure might not be involved in this transformation. In addition, simple decoration of the obtained compounds delivers novel and attractive tetraphenylethylene moiety containing N‐2‐aryl‐naphthotriazole derivatives.magnified image
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