SEARCH Articles Figures Tables Alkaloids piperidine ring Analogs with C-methyl (and Other Hydrocarbon) Substituents in the Piperidine Ring Elimination ring-opening, piperidine Oxygen Function at C-4 of the Piperidine Ring Piperidine ring formation Piperidine ring synthesi Piperidine rings, alkaloids with Piperidines ring synthesis from Piperidines with Fused Rings RING REARRANGEMENT METATHESIS (RRM) A NEW CONCEPT IN PIPERIDINE AND PYRROLIDINE SYNTHESIS