Dearomative Spirocyclization of Tryptamine-Derived Isocyanides via Iron-Catalyzed Carbene Transfer
作者:Thomas R. Roose、Finn McSorley、Bryan Groenhuijzen、Jordy M. Saya、Bert U. W. Maes、Romano V. A. Orrù、Eelco Ruijter
DOI:10.1021/acs.joc.3c02160
日期:2023.12.15
Tryptamine-derived isocyanides are valuable building blocks in the construction of spirocyclic indolenines and indolines via dearomatization of the indole moiety. We report the Bu4N[Fe(CO)3NO]-catalyzed carbene transfer of α-diazo esters to 3-(2-isocyanoethyl)indoles, leading to ketenimine intermediates that undergo spontaneous dearomative spirocyclization. The utility of this iron-catalyzed carbene