A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, HPLC of Formula: C5H7NO2, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1121-89-7, Name is Piperidine-2,6-dione, molecular formula is C5H7NO2. In a Article, authors is Karstens, Willem F.J.，once mentioned of 1121-89-7
By using N-acyliminium ion chemistry, several omega-propadienyllactams and a propadienyloxazolidine were prepared from N-acyliminium ion precursors and propargylsilanes. Treatment of these allene containing lactams and oxazolidinone with allyl halides or an allyl carbonate using Pd(II)-salts as the catalyst gave rise to a coupling-cyclization reaction, yielding bicyclic systems in which the allyl moiety is incorporated. With this methodology several substituted pyrrolizinones, an oxazolone and indolizinone were prepared.
I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 1121-89-7, help many people in the next few years.HPLC of Formula: C5H7NO2
Reference：
Piperidine – Wikipedia,
Piperidine | C5H1473N – PubChem