A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, name: tert-Butyl 4-formylpiperidine-1-carboxylate, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 137076-22-3, Name is tert-Butyl 4-formylpiperidine-1-carboxylate, molecular formula is C11H19NO3. In a Article, authors is White, Nicholas A.，once mentioned of 137076-22-3
An asymmetric intermolecular reaction between enals and nitroalkenes to yield delta-nitroesters has been developed, catalyzed by a novel chiral N-heterocyclic carbene. Key to this work was the development of a catalyst that favors the delta-nitroester pathway over the established Stetter pathway. The reaction proceeds in high stereoselectivity and affords the previously unreported syn diastereomer. We also report an operationally facile two-step, one-pot procedure for the synthesis of delta-lactams.
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Reference：
Piperidine – Wikipedia,
Piperidine | C5H16451N – PubChem