Abstract
An efficient method for the construction of C(sp2)CN bonds directly from C(sp2-H) cyanation of 3-arylideneindolin-2-ones with benzoyl cyanide under transition metal-free condition is described. Various 2-(2-oxoindolin-3-ylidene)-2-arylacetonitriles were efficiently synthesized using air as an oxidant under mild conditions. This protocol has excellent functional group tolerance and can be easily scaled up with good efficiency. This reaction successfully offers an alternative to structurally diverse alkenyl nitriles.
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