14008-96-9Relevant academic research and scientific papers
Synthesis and evaluation of N1-alkylindole-3-ylalkylammonium compounds as nicotinic acetylcholine receptor ligands
Perez, Edwin G.,Cassels, Bruce K.,Eibl, Christoph,Guendisch, Daniela
, p. 3719 - 3727 (2012)
In this study thirty-three novel indole derivatives were designed and synthesized based on the structure of deformylflustrabromine B (1), a metabolite isolated from the marine bryozoan Flustra foliacea L. The syntheses were carried out using standard methodologies and in good yields. The molecules were tested for their affinities for the α4β2*, α3β 4*, α7* and (α1)2β1γδ nicotinic acetylcholine receptor (nAChR) subtypes. Binding assays showed that, among these ligands, compound 7c exhibited the highest affinity with K i = 136.1, 93.9 and 862.4 nM for the α4β2*, α3β4*, and α7* nAChRs subtypes, respectively. These results indicated that the indole core might be a useful scaffold for the development of new potent and selective nAChR ligands.
Ruthenium Complex-Catalyzed N-Heterocyclization. Syntheses of N-Substituted Pyrroles and Pyrrolidines from 1,4-Diols and Primary Amines
Tsuji, Yasushi,Yokoyama, Yasuharu,Huh, Keun-Tae,Watanabe, Yoshihisa
, p. 3456 - 3458 (1987)
2-Butyne-1,4-diol reacts with aliphatic amines in the presence of a catalytic amount of at 150 deg C to give N-alkylpyrroles in good yields. 1,4-Butanediol reacts with aromatic or aliphatic amines to give N-substituted pyrrolidines in excellent yields; and are the best catalysts for aromatic and aliphatic amines, respectively.The reaction of 2-butene-1,4-diol with alkyl amines gives a 1:1 mixture of N-substituted pyrroles and pyrrolidines in high yield.
Engineering an enantioselective amine oxidase for the synthesis of pharmaceutical building blocks and alkaloid natural products
Ghislieri, Diego,Green, Anthony P.,Pontini, Marta,Willies, Simon C.,Rowles, Ian,Frank, Annika,Grogan, Gideon,Turner, Nicholas J.
, p. 10863 - 10869 (2013/08/23)
The development of cost-effective and sustainable catalytic methods for the production of enantiomerically pure chiral amines is a key challenge facing the pharmaceutical and fine chemical industries. This challenge is highlighted by the estimate that 40-45% of drug candidates contain a chiral amine, fueling a demand for broadly applicable synthetic methods that deliver target structures in high yield and enantiomeric excess. Herein we describe the development and application of a "toolbox" of monoamine oxidase variants from Aspergillus niger (MAO-N) which display remarkable substrate scope and tolerance for sterically demanding motifs, including a new variant, which exhibits high activity and enantioselectivity toward substrates containing the aminodiphenylmethane (benzhydrylamine) template. By combining rational structure-guided engineering with high-throughput screening, it has been possible to expand the substrate scope of MAO-N to accommodate amine substrates containing bulky aryl substituents. These engineered MAO-N biocatalysts have been applied in deracemization reactions for the efficient asymmetric synthesis of the generic active pharmaceutical ingredients Solifenacin and Levocetirizine as well as the natural products (R)-coniine, (R)-eleagnine, and (R)-leptaflorine. We also report a novel MAO-N mediated asymmetric oxidative Pictet-Spengler approach to the synthesis of (R)-harmicine.
N-Alkylation of phenethylamine and tryptamine
Cami-Kobeci, Gerta,Slatford, Paul A.,Whittlesey, Michael K.,Williams, Jonathan M.J.
, p. 535 - 537 (2007/10/03)
A clean and efficient method for the N-alkylation of tryptamine and phenethylamine, employing alcohols as the alkylating agents, has been developed. The reaction proceeds via catalytic electronic activation, involving an iridium catalyst which activates the alcohol by borrowing hydrogen from the substrate, returning it later in the catalytic cycle. Some examples of N-heterocyclisation have been performed employing a diol as the substrate.
