104223-69-0Relevant articles and documents
Accessing (Multi)Fluorinated Piperidines Using Heterogeneous Hydrogenation
Bergander, Klaus,Daniliuc, Constantin G.,Glorius, Frank,Heusler, Arne,Nairoukh, Zackaria,Wagener, Tobias
, p. 12052 - 12057 (2020)
Fluorinated piperidines are desirable motifs for pharmaceutical and agrochemical research. Nevertheless, general synthetic access remains out of reach. Herein, we describe a simple and robust cis-selective hydrogenation of abundant and cheap fluoropyridines to yield a broad scope of (multi)fluorinated piperidines. This protocol enables the chemoselective reduction of fluoropyridines while tolerating other (hetero)aromatic systems using a commercially available heterogenous catalyst. Fluorinated derivatives of important drug compounds are prepared, and a straightforward strategy for the synthesis of enantioenriched fluorinated piperidines is disclosed.
γ-amino-substituted analogues of 1-[(S)-2,4-diaminobutanoyl]piperidine as highly potent and selective dipeptidyl peptidase II inhibitors
Senten, Kristel,Van Der Veken, Pieter,De Meester, Ingrid,Lambeir, Anne-Marie,Scharpé, Simon,Haemers, Achiel,Augustyns, Koen
, p. 2906 - 2916 (2007/10/03)
Using 1-[(S)-2,4-diaminobutanoyl]piperidine as lead compound, we developed a large series of highly potent and selective dipeptidyl peptidase II (DPP II) inhibitors. γ-Amino substitution with arylalkyl groups, for example, a 2-chlorobenzyl moiety, resulted in a DPP II inhibitor with an IC50 = 0.23 nM and a high selectivity toward DPP IV (IC50 = 345 μM). Furthermore, it was shown that the basicity of the γ-amino is important and that α-amino substitution is not favorable. Piperidine-2-nitriles did not show an increase in potency but rather reduced the selectivity. Introduction of a 4-methyl or a 3-fluorine on piperidine improved selectivity and preserved the high potency.
