Ti. Mukhanova et al., AN UNUSUAL STEREOELECTRONICALLY-DICTATED, QUINONE-MEDIATED DEHYDROGENATION IMPLICATED IN DIENEDIAMINOKETONE NENITZESCU REACTIONS, Mendeleev communications, (2), 1995, pp. 69-70
For the first time dienediaminoketones enzoyl-2-arylamino-4-dimethylam
inobuta-1,3-dienes) have been used in a reaction with benzoquinone and
as a result dimethylamino-3-(1'-aryl-3'-benzoyl-5-hydroxyindol -2'-yl
)-5-hydroxybenzofurans have been synthesized.