80827-62-9Relevant academic research and scientific papers
N-Ammonium Ylide Mediators for Electrochemical C-H Oxidation
Saito, Masato,Kawamata, Yu,Meanwell, Michael,Navratil, Rafael,Chiodi, Debora,Carlson, Ethan,Hu, Pengfei,Chen, Longrui,Udyavara, Sagar,Kingston, Cian,Tanwar, Mayank,Tyagi, Sameer,McKillican, Bruce P.,Gichinga, Moses G.,Schmidt, Michael A.,Eastgate, Martin D.,Lamberto, Massimiliano,He, Chi,Tang, Tianhua,Malapit, Christian A.,Sigman, Matthew S.,Minteer, Shelley D.,Neurock, Matthew,Baran, Phil S.
supporting information, p. 7859 - 7867 (2021/05/26)
The site-specific oxidation of strong C(sp3)-H bonds is of uncontested utility in organic synthesis. From simplifying access to metabolites and late-stage diversification of lead compounds to truncating retrosynthetic plans, there is a growing need for new reagents and methods for achieving such a transformation in both academic and industrial circles. One main drawback of current chemical reagents is the lack of diversity with regard to structure and reactivity that prevents a combinatorial approach for rapid screening to be employed. In that regard, directed evolution still holds the greatest promise for achieving complex C-H oxidations in a variety of complex settings. Herein we present a rationally designed platform that provides a step toward this challenge using N-ammonium ylides as electrochemically driven oxidants for site-specific, chemoselective C(sp3)-H oxidation. By taking a first-principles approach guided by computation, these new mediators were identified and rapidly expanded into a library using ubiquitous building blocks and trivial synthesis techniques. The ylide-based approach to C-H oxidation exhibits tunable selectivity that is often exclusive to this class of oxidants and can be applied to real-world problems in the agricultural and pharmaceutical sectors.
Synthesis, in vitro binding studies and docking of long-chain arylpiperazine nitroquipazine analogues, as potential serotonin transporter inhibitors
Jarończyk, Ma?gorzata,Wo?osewicz, Karol,Gabrielsen, Mari,Nowak, Gabriel,Kufareva, Irina,Mazurek, Aleksander P.,Ravna, Aina W.,Abagyan, Ruben,Bojarski, Andrzej J.,Sylte, Ingebrigt,Chilmonczyk, Zdzis?aw
experimental part, p. 200 - 210 (2012/04/10)
It is well known that 6-nitroquipazine exhibits about 150-fold higher affinity for the serotonin transporter (SERT) than quipazine and recently we showed quipazine buspirone analogues with high to moderate SERT affinity. Now we have designed and synthesized several 6-nitroquipazine buspirone derivatives. Unexpectedly, their SERT binding affinities were moderate, and much lower than that of the previously studied quipazine buspirone analogues. To explain these findings, docking studies of both groups of compounds into two different homology models of human SERT was performed using a flexible target-ligand docking approach (4D docking). The crystal structures of leucine transporter from Aquifex aeolicus in complex with leucine and with tryptophan were used as templates for the SERT models in closed and outward-facing conformations, respectively. We found that the latter conformation represents the most reliable model for binding of buspirone analogues. Docking into that model showed that the nitrated compounds acquire a rod like shape in the binding pocket with polar groups (nitro- and imido-) at the ends of the rod. 6-Nitro substituents gave steric clashes with amino acids located at the extracellular loop 4, which may explain their lower affinity than corresponding quipazine buspirone analogues. The results from the present study may suggest chemical design strategies to improve the SERT modulators.
Synthesis of new compounds containing the 2,3-dihydro[1,4]dioxino[2,3-b]pyridine heterocyclic system as a substructure
Soukri,Lazar,Pujol,Akssira,Leger,Jarry,Guillaumet
, p. 3665 - 3672 (2007/10/03)
2,3-Dihydro-spiro[1,4]dioxino[2,3-b]pyridine-3,3′-pyrrolidine (8A) and 2,3-dihydro-spiro[1,4]dioxino[2,3-b]pyridine-3,4′-piperidine (9A) have been synthesized from 2-chloro-3-pyridinol. The corresponding 2,3′ (8B) and 2,4′ (9B) isomers were obtained via the Smiles rearrangement, while 9B was also selectively synthesized from 2-nitro-3-pyridinol. The separation of the isomers A and B under the sulfamide form was carried out by flash column chromatography. Subsequent transformations of the corresponding dioxinopyridine derivatives were described.
3,4-Dihydro-3-amino-2H-1-benzopyran Derivatives as 5-HT1A Receptor Ligands and Potential Anxiolytic Agents. 1. Synthesis and Structure-Activity Relationship Studies
Podona, Tchao,Guardiola-Lemaitre, Beatrice,Caignard, Daniel-Henri,Adam, Gerard,Pfeiffer, Bruno,et al.
, p. 1779 - 1793 (2007/10/02)
A series of 3,4-dihydro-3-amino-2H-1-benzopyran derivatives were prepared in order to determine the necessary structural requirements for good affinity for 5-HT1A receptors and high selectivity versus other receptors.Modifications of the extrac
N-[(4-Phenyl-1,2,3,6-tetrahydropyridin-1-yl)alkylene]azaspiroalkanediones and N-[(4-hydroxy-4-phenylpiperidin-1-yl)alkylene]azaspiroalkanediones
-
, (2008/06/13)
N-[(4-Phenyl-1,2,3,6-tetrahydropyridin-1-yl)alkylene]azaspiroalkanediones having substituents in the phenyl ring have been synthesized and demonstrate useful tranquilizing properties. N-[(4-Hydroxy-4-phenylpiperidin-1-yl)alkylene]azaspiroalkanediones are
N-[(4-[3-CYANO SUBSTITUTED PYRIDYL]PIPERAZINO)ALKYL]-AZASPIRODECANEDIONES
-
, (2008/06/13)
2-[4-[4-(7,9-Dioxo-8-azaspiro[4.5]decan-8-yl)butyl]-1-piperazinyl] pyridi ne-3-carbonitrile, 2-[4-[4-(7,9-dioxo-8-azaspiro-[4. 5]decan-8-yl) butyl]-3-methyl-1-piperazinyl ]pyridine-3-carbonitrile and 8-[4-[4-(3-methoxy-2-pyridinyl)-1-piperazinyl]butyl]-8-azaspiro-[4.5] decane-7,9-dione are psychotropic compounds.
