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A tandem carbonyl ylide/1,3-dipolar cycloaddition cascade of α-diazo indole-2,3-dione with several different dipolarophiles was investigated. The intermolecular Rh(II)-catalyzed reaction occurs efficiently and affords dipolar cycloadducts in high yields. The analogous intramolecular reaction also takes place and gives an azapolycyclic product derived from trapping of the carbonyl ylide dipole with...
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