Category: 123536-14-1

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. category: quinuclidine. Introducing a new discovery about category: quinuclidine, Name is (R)-3-Aminoquinuclidine dihydrochloride

Synthesis of (R) and (S)-3-aminoquinuclidine from 3-quinuclidinone and (S) and (R)-1-phenethylamine

The synthesis of (R) and (S)-3-amino quinuclidine, an important building block for the synthesis of chiral 5-HT3 serotonin receptor antagonists, is described. The key reaction is the reduction by NaBH4 of the imine prepared from the 3-quinuclidinone and chiral (S) or (R)-1-phenethylamine.

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In heterogeneous catalysis, the catalyst is in a different phase from the reactants. SDS of cas: 123536-14-1, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 123536-14-1, name is (R)-3-Aminoquinuclidine dihydrochloride. In an article£¬Which mentioned a new discovery about 123536-14-1

Optimized synthesis and solid state investigations on the drug candidate encenicline hydrochloride

For the production of drug substances a robust, scalable process delivering the active pharmaceutical ingredient (API) in excellent chemical and polymorphic purity is required. For this purpose we developed a novel imidazole-mediated one-pot procedure for the preparation of encenicline hydrochloride monohydrate, which crystallizes directly from the reaction mixture as pure non-hygroscopic polymorph (Form I). Solid state studies revealed a series of additional new physical forms for which crystal structures have been determined by single crystal X-ray diffraction.

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Quinuclidine | C7H149N | ChemSpider

Because a catalyst decreases the height of the energy barrier, Application In Synthesis of (R)-3-Aminoquinuclidine dihydrochloride, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.Application In Synthesis of (R)-3-Aminoquinuclidine dihydrochloride, Name is (R)-3-Aminoquinuclidine dihydrochloride, molecular formula is C7H16Cl2N2. In a article£¬once mentioned of Application In Synthesis of (R)-3-Aminoquinuclidine dihydrochloride

Design, synthesis, structure-activity relationship, and in vivo activity of azabicyclic aryl amides as alpha7 nicotinic acetylcholine receptor agonists

A novel set of azabicyclic aryl amides have been identified as potent and selective agonists of the alpha7 nAChR. A two-pronged approach was taken to improve the potential hERG liability of previously disclosed alpha7 nAChR agonist, PNU-282,987, while maintaining the compound’s other desirable pharmacological properties. The first approach involved further exploration of the aryl carboxylic acid fragment of PNU-282,987, while the second approach focused on modification of the azabicyclic amine portion of PNU-282,987. The best compounds from each series are characterized by rapid brain penetration, good oral bioavailability in rat, and demonstrate in vivo efficacy in a rat P50 auditory sensory gating assay. At least one analog from each series (1h, 1o, 2a, 9a, and 18a) shows an improved hERG safety profile over PNU-282,987.

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Chemistry is traditionally divided into organic and inorganic chemistry. Product Details of 123536-14-1, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about Product Details of 123536-14-1

QUINUCLIDINES SUBSTITUTED BENTODIOXINE CARBOXAMIDES FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES

The invention provides the malate salt of compounds of Formula I, wherein X is malate salt, including D- or L-; wherein A is (a), wherein B is (b) or pharmaceutical composition, racemic mixture, or pure enantiomer thereof. The compounds of Formula I are useful to treat diseases or conditions in which alpha7 is known to be involved.

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Pharmacological profile of zacopride and new quaternarized fluorobenzamide analogues on mammalian alpha7 nicotinic acetylcholine receptor

Abstract From quaternarization of quinuclidine enantiomers of 2-fluoro benzamide LMA10203 in dichloromethane, the corresponding N-chloromethyl derivatives LMA10227 and LMA10228 were obtained. Here, we compared the agonist action of known zacopride and its 2-fluoro benzamide analogues, LMA10203, LMA10227 and LMA10228 against mammalian homomeric alpha7 nicotinic acetylcholine receptor expressed in Xenopus oocytes. We found that LMA10203 was a partial agonist of alpha7 receptor with a pEC50 value of 4.25 ¡À 0.06 muM whereas LMA10227 and LMA10228 were poorly active on alpha7 homomeric nicotinic receptor. LMA10227 and LMA10228 were identified as antagonists of acetylcholine-induced currents with IC50 values of 28.4 muM and 39.3 muM whereas LMA10203 and zacopride possessed IC50 values of 8.07 muM and 7.04 muM, respectively. Moreover, despite their IC50 values, LMA10227 was the most potent inhibitor of nicotine-induced current amplitudes (65.7 ¡À 2.1% inhibition). LMA10203 and LMA10228 had the same inhibitory effects (26.5 ¡À 7.5% and 33.2 ¡À 4.1%, respectively), whereas zacopride had no significant inhibitory effect (4.37 ¡À 4%) on nicotine-induced responses. Our results revealed different pharmacological properties between the four compounds on acetylcholine and nicotine currents. The mode of action of benzamide compounds may need to be reinterpreted with respect to the potential role of alpha7 receptor.

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Related Products of 123536-14-1, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.Related Products of 123536-14-1, Name is (R)-3-Aminoquinuclidine dihydrochloride, molecular formula is C7H16Cl2N2. In a Article, authors is Sarasamkan, Jiradanai£¬once mentioned of Related Products of 123536-14-1

Varying Chirality Across Nicotinic Acetylcholine Receptor Subtypes: Selective Binding of Quinuclidine Triazole Compounds

The novel quinuclidine anti-1,2,3-triazole derivatives T1-T6 were designed based on the structure of QND8. The binding studies revealed that the stereochemistry at the C3 position of the quinuclidine scaffold plays an important role in the nAChR subtype selectivity. Whereas the (R)-enantiomers are selective to alpha7 over alpha4beta2 (by factors of 44-225) and to a smaller degree over alpha3beta4 (3-33), their (S)-counterparts prefer alpha3beta4 over alpha4beta2 (62-237) as well as over alpha7 (5-294). The (R)-derivatives were highly selective to alpha7 over alpha3beta4 subtypes compared to (RS)- and (R)-QND8. The (S)-enantiomers are 5-10 times more selective to alpha4beta2 than their (R) forms. The overall strongest affinity is observed for the (S)-enantiomer binding to alpha3beta4 (Ki, 2.25-19.5 nM) followed by their (R)-counterpart binding to alpha7 (Ki, 22.5-117 nM), with a significantly weaker (S)-enantiomer binding to alpha4beta2 (Ki, 414-1980 nM) still above the very weak respective (R)-analogue affinity (Ki, 5059-10436 nM).

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Quinuclidine | C7H154N | ChemSpider

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Dual organocatalysis: Asymmetric allylic-allylic alkylation of alpha,alpha-dicyanoalkenes and Morita-Baylis-Hillman carbonates

The unprecedented asymmetric allylic-allylic alkylation of alpha,alpha-dicyanoalkenes and Morita-Baylis-Hillman (MBH) carbonates were developed by catalyzing by a suitable chiral tertiary amine. The resulting multifunctional alkylation products could also serve as versatile intermediates for other synthetic transformations. The analogous catalysts show no catalytic activity in the model reaction due to steric activity. The alkylation reaction could be conducted at higher temperature in 1,2-dichloroethane (DCE) with little effect on the enantioselectivity. Excellent results are obtained by employing two equivalents of the MBH adduct and when 10% mol of (R)-BINOL is used. Mixtures of mono and double-allylic alkylation products are formed when symmetric alpha,alpha-dicyanoalkenes are applied. It is also found that the double-allylic alkylation adducts with four stereogenic centers could be isolated as single diasteromers with remarkable ee values.

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Quinuclidine | C7H141N | ChemSpider

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Novel potent 5-HT3 receptor ligands based on the pyrrolidone structure: Synthesis, biological evaluation, and computational rationalization of the ligand-receptor interaction modalities

Novel conformationally constrained derivatives of classical 5-HT3 receptor antagonists were designed and synthesized with the aim of probing the central 5-HT3 receptor recognition site in a systematic way. The newly-synthesized compounds were tested for their potential ability to inhibit [3H]granisetron specific binding to 5-HT3 receptor in rat cortical membranes. These studies revealed subnanomolar affinity in some of the compounds under study. The most potent ligand in this series was found to be quinuclidine derivative (S)-7i, which showed an affinity comparable with that of the reference ligand granisetron. The potential 5-HT3 agonist/antagonist activity of some selected compounds was assessed in vitro on the 5-HT3 receptor-dependent [14C]guanidinium uptake in NG 108-15 cells. Both of the tropane derivatives tested in this functional assay (7a and 9a) showed antagonist properties, while the quinuclidine derivatives studied [the enantiomers of compounds 7i, 8g, and 9g, and compound (R)-8h] showed a full range of intrinsic efficacies. Therefore, the functional behavior of these 5-HT3 receptor ligands appears to be affected by the structural features of both the azabicyclo moiety and the heteroaromatic portion. In agreement with the data obtained on NG 108-15 cells, investigations on the 5-HT3 receptor-dependent Bezold-Jarisch reflex in urethane-anaesthetized rats confirmed the 5-HT3 receptor antagonist properties of compounds 7a and (S)-7i showing for these compounds ID50 values of 2.8 and 181 mug/kg, respectively. Finally, compounds 7a, (S)-7i and 9a (at the doses of 0.01, 1.0, and 0.01 mg/kg ip, respectively) prevented scopolamine-induced amnesia in the mouse passive avoidance test suggestive of a potential usefulness in cognitive disorders for these compounds. Qualitative and quantitative structure-affinity relationship studies were carried out by means of theoretical descriptors derived on a single structure and ad-hoc defined size and shape descriptors (indirect approach). The results showed to be useful in capturing information relevant to ligand-receptor interaction. Additional information derived by the analysis of the energy minimized 3-D structures of the ligand-receptor complexes (direct approach) suggested interesting mechanistic and methodological considerations on the binding mode multiplicity at the 5-HT3 receptors and on the degree of tolerance allowed in the alignment of molecules for the indirect approach, respectively.

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Discovery of fused heterocyclic carboxamide derivatives as novel alpha7-nAChR agonists: Synthesis, preliminary SAR and biological evaluation

The alpha7 nicotinic acetylcholine receptor (alpha7 nAChR) has emerged as a promising therapeutic target for schizophrenia. In our previous work, a novel series of alpha7-nAChR agonists bearing scaffold of indolizine were discovered. To explore the effect of aromaticity on the activity and find more active agents, herein, fused heterocyclic carboxamide derivatives were designed and synthesized in this study. Based on the evaluation by two-electrode voltage clamp in Xenopus oocytes, 27 of the synthesized compounds showed obvious agonism of alpha7 nAChR. Particularly, compounds 10a and 10e showed significantly higher Emax than EVP-6124. The result illustrated the importance of aromaticity to the activity of agonism. Compound 10a, which showed EC50 of 1.88 muM and Emax of 72.4%, was further characterized comprehensively, including co-application with type II positive allosteric modulator PNU-120596, selectivity with other closely related ligand-gated ion channel, etc. The results showed that 10a showed moderate selectivity over other subtypes such as alpha4beta2 and alpha3beta4 nAChR. 10a evoked alpha7-like currents that were inhibited by MLA and enhanced in the presence of the alpha7 PAM PNU-120596. The analysis of binding mode and understanding of structure-activity relationship provided insights to develop more potent novel alpha7-nAChR agonists.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬Which mentioned a new discovery about Recommanded Product: (R)-3-Aminoquinuclidine dihydrochloride, molcular formula is C7H16Cl2N2, introducing its new discovery. , Recommanded Product: (R)-3-Aminoquinuclidine dihydrochloride

Quinuclidine-substituted hetero-bicyclic aromatic compounds for the treatment of disease

The invention provides compounds of Formula I: 1wherein W0 is a bicyclic moiety and is 2These compounds may be in the form of pharmaceutical salts or compositions, may be in pure enantiomeric form or racemic mixtures, and are useful to treat diseases or conditions in which alpha7 is known to be involved.

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