The author of 《nBu4NI-catalyzed C3-formylation of indoles with N-methylaniline》 were Li, Lan-Tao; Huang, Juan; Li, Hong-Ying; Wen, Li-Juan; Wang, Peng; Wang, Bin. And the article was published in Chemical Communications (Cambridge, United Kingdom) in 2012. Synthetic Route of C10H6N2O The author mentioned the following in the article:
NBu4NI-catalyzed C3-selective formylation of N-H and N-substituted indoles by using N-methylaniline as a formylating reagent was first successfully demonstrated. The experimental process involved the reaction of 3-Formyl-1H-indole-6-carbonitrile(cas: 83783-33-9Synthetic Route of C10H6N2O)
3-Formyl-1H-indole-6-carbonitrile(cas: 83783-33-9) is a member of nitriles. Nitriles have been reduced to amines by many methods, especially by catalytic hydrogenation and by metal hydrides. Aliphatic and aromatic nitriles have also been reduced to nitro derivatives using hydrazinium monoformate in the presence of Raney-nickel.Synthetic Route of C10H6N2O
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts