N-Heterocyclic Carbene Catalyzed Reaction of Phthalaldehydes: Controllable Stereoselective Synthesis of Polyhydroxylated Spiro- and Fused Indenones Dictated by the Structure of NHC Catalysts.

2011

In the presence of IMC, phthalaldehydes undergo efficient dimerization yielding spirocyclic indenones like (II).

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