A series of cyclic β-amino acids fused with heteroaromatic moieties was prepared by
Rh-catalyzed electrophilic amination. The transformation involves a rhodium alkyl
nitrene generated from substituted isoxazolidin-5-ones upon the N–O bond cleavage.
These products contain an underexplored class of cyclic structures that may have specific
applications in various chemistry disciplines.
Key words
rhodium - β-amino acids - nitrene - N-heterocycle - CH functionalization