Rhodium(III)‐Catalyzed Three‐Component Cascade Annulation for Modular Assembly of
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‐Alkoxylated Isoindolin‐1‐Ones with Quaternary Carbon Center
A cascade C−H activation, annulation, and etherification of N-hydroxybenzamides with propargylamines provides a flexible route to N-alkoxylated 3-arylisoindolin-1-ones. Three new bonds (C−C, C−N, and C−O) are generated to afford a series of isoindolin-1-ones bearing a tetrasubstituted carbon in 49–82% yield. The utility of this method was showcased by gram-scale synthesis and synthetic transformations
A sequential Rh(III)-catalyzed C-H activation/annulation of N-hydroxybenzamides with propargylic acetates leading to the formation of NH-free isoquinolones is described. This reaction proceeds through a sequential C-H activation/alkyne insertion/intramolecular annulation/N-O bond cleavage procedure, affording a broad spectrum of products with diverse substituents in moderate-to-excellent yields. Notably