Cobalt-Catalyzed Switchable [4 + 1] and [4 + 1 + 1] Spirocyclization of Aromatic Amides with 2-Diazo-1H-indene-1,3(2H)-dione: Access to Spiro Indene-2,1’-isoindolinones and Spiro Isochroman-3,1’-isoindolinones Author, Corresponding Author,* and Author Chin. J. Chem. 2023, 41, XXX—XXX. DOI: 10.1002/cjoc.202300XXX
Herein we report a condition-controlled divergent synthesis of spiro indene-2,1’-isoindolinones and spiro isochroman-3,1’-isoindolinones through cobalt-catalyzed formal [4 + 1] and [4 + 1 + 1] spirocyclization of aromatic amides with 2-diazo-1H-indene-1,3(2H)-dione.