A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 88495-54-9, Name is (S)-1-(tert-Butoxycarbonyl)piperidine-3-carboxylic acid, molecular formula is C11H19NO4. In an article, author is Liang, Guoduan,once mentioned of 88495-54-9, Recommanded Product: 88495-54-9.
Diastereoselective Syntheses of Spiro[indoline-3,4 ‘-pyridin]-2-yl Carbamates via AgOTf/Ph3P-Catalyzed Tandem Cyclizations of Tryptamine-Ynesulfonamides
Spiro[indoline-3,4′-piperidine] is a significant structural scaffold in numerous polycyclic indole alkaloids with a variety of bioactivities. In this study, a synthetic strategy was developed to access spiro[indoline-3,4′-pyridin]-2-yl carbamate via an AgOTf/ PPh3-catalyzed tandem cyclization of tryptamine-ynesulfonamides. The unique feature of this strategy is the efficient intermolecular capturing of the in situ generated spiroindoleninium intermediates with carbamates, leading to the diastereoselective syntheses of spiro[indoline-3,4’-pyridin]-2-yl carbamate derivatives. A broad scope of this cyclization was demonstrated by a variety of tryptamine-ynesulfonamide substrates and several carbamates. A plausible mechanism of this reaction was proposed.
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Reference:
Piperidine – Wikipedia,
,Piperidine | C5H11N – PubChem