The synthesis of functionalized pyranophenalenones

In situ generation and protonation of the isocyanide/acetylene adduct: a powerful catalyst-free strategy for multicomponent synthesis of ketenimines, aza-dienes, and heterocycles

In addition to isocyanide-based Ugi, Passerini, van Leusen, and Orru multicomponent reactions, a new class of isocyanide/acetylene-based multicomponent reactions, using zwitterionic adducts, have emerged as powerful methods to synthesize biologically interesting molecules.

One-Pot Three-Component Access to Pyranocyclopentendiones

An efficient synthesis of dialkyl 2-(alkylamino)-5,6-dioxo-4a,7-diphenyl-4,4a,5,6-tetrahydrocyclopenta[b]pyran-3,4-dicarboxylates from one-pot three-component reaction of the zwitterions generated from dialkyl acetylenedicarboxylates and alkyl isocyanides with 3,5-diphenylcyclopentane-1,2,4-trione is described.