A rhodium-catalyzed ortho-cyanation of symmetrical azobenzenes is described employing N-cyano-N-phenyl-p-toluenesulfonamide as an environmentally friendly cyanide source. The present protocol allows the synthesis of various benzonitrile derivatives in moderate to good yields and tolerates many useful functional groups.
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http://dx.doi.org/10.1039/c4ob01736f | DOI Listing |
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