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Beilstein J. Org. Chem. 2013, 9, 8–14, doi:10.3762/bjoc.9.2
Graphical Abstract
Scheme 1: The four-component reactions containing dimedone (a) and cyclopentane-1,3-dione (b).
Figure 1: Molecular structure of spiro[dihydropyridine-oxindole] 1b.
Figure 2: The two kinds of spiro compounds from reactions of isatins with arylamines and cyclic 1,3-diketones....
Figure 3: Molecular structure of spiro[dihydropyridine-oxindole] 2f.
Scheme 2: Condensation reactions of isatins with cyclopentane-1,3-dione.
Figure 4: Molecular structure of compound 3d.
Scheme 3: Proposed reaction mechanism for the three-component reaction.