Tag: M.W=200-300

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is d’Agostino, Simone, once mentioned the application of 253168-94-4, Name is 1-(3-Ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethanamine, molecular formula is C12H19NO4S, molecular weight is 273.35, MDL number is MFCD27665207, category is quinuclidines. Now introduce a scientific discovery about this category, HPLC of Formula: C12H19NO4S.

Intriguing Case of Pseudo-Isomorphism between Chiral and Racemic Crystals of rac- and (S)/(R)2-(1,8-Naphthalimido)-2-quinuclidin-3-yl, and Their Reactivity Toward I-2 and 1Br

Condensation reactions between 1,8-naphthalic anhydride and racemic 3-aminoquinuclidine or chiral (S) or (R)-(-)-3-aminoquinuclidine allowed preparation of three novel racemic and enantiopure aza-donor ligands, namely NMiABCO (1), (S)NMiABCO (2a), and (R)NMiABCO (2b). Racemic NMiABCO (1) crystallizes in the monoclinic space group P2(1)/c, Z’ = 1, while enantiopure (S)NMiABCO (2a) and (R)NMiABCO (2b) crystallize in the chiral monoclinic space group P2(1), Z’ = 2, and show significant pseudocentrosymmetry, being pseudo-isomorphous with racemic NMiABCO (1). Reactivity of both racemic and enantiopure NMiABCO toward iodine and interhalogen IBr was also investigated as a way to remove the pseudoisomorphism, yielding the three new molecular adducts [NMiABCO center dot I-2] (3), [(S)NMiABCO center dot I-2]center dot xCHCl(3) (4), [(S)NMiABCO center dot IBr]center dot xCHCl(3) (5) and the molecular salt [HNMIABCO][1Br(2)] (6). Synthesis of complexes 3 and 4 was also carried out in the solid state via kneading and vapor digestion techniques. All compounds were fully characterized via single crystal and powder X-ray diffraction and Raman spectroscopy.

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Electric Literature of 1889-67-4, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 1889-67-4, Name is (2,3-Dimethylbutane-2,3-diyl)dibenzene, SMILES is CC(C)(C1=CC=CC=C1)C(C)(C2=CC=CC=C2)C, belongs to quinuclidines compound. In a article, author is Liu, H, introduce new discover of the category.

Synthesis and crystal structure of quinuclidin-3-yl 2-cyclopentyl-2-hydroxy-2-phenylacetate

Quinuclidin-3-yl 2-cyclopentyl-2-hydroxy-2-phenylacetate, a more effective the muscarinic receptor antagonist, was synthesised and its crystal structure was first elucidated by X-ray crystallography.

Electric Literature of 1889-67-4, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 1889-67-4 is helpful to your research.

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Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.68131-04-4, Name is Sodium bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate, SMILES is O=C([O-])C1C(C([O-])=O)C2C=CC1C2.[Na+].[Na+], belongs to quinuclidines compound. In a document, author is Primozic, Ines, introduce the new discover, Application In Synthesis of Sodium bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate.

Binding Modes of Quinuclidinium Esters to Butyrylcholinesterase

The orientations of chiral quinuclidin-3-ol esters and benzoylcholine in the active site of horse butyrylcholinesterase have been investigated by flexible ligand docking. Change of the esters’ acyl moiety as well as the substituent at the quinuclidinium nitrogen atom affected the activity and stereoselectivity of the biotransformations. Analysis of interactions in the active site revealed the most important binding patterns for enantiomers, which define their reactivity. Calculated Gibbs energies of binding obtained by molecular docking simulations were well correlated to the experimentally determined binding affinities of the investigated chiral esters. (doi: 10.5562/cca2060)

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 68131-04-4. Application In Synthesis of Sodium bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate.

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In an article, author is Niphade, Navnath C., once mentioned the application of 31906-04-4, Name is 4-(4-Hydroxy-4-methylpentyl)cyclohex-3-enecarbaldehyde, molecular formula is C13H22O2, molecular weight is 210.3126, MDL number is MFCD00019423, category is quinuclidines. Now introduce a scientific discovery about this category, SDS of cas: 31906-04-4.

Efficient and single pot process for the preparation of enantiomerically pure solifenacin succinate, an antimuscarinic agent

The development of an efficient and economic one-pot process, in which the configuration of the chiral centers of the starting materials is retained, for the preparation of highly pure solifenacin succinate, an antimuscarinic agent, is presented in this communication. The earlier reported processes suffer from the drawbacks of racemization and low yields due to the use of strong base, higher temperatures, and longer reaction times. The present work circumvents these issues by activating (3R)-quinuclidin-3-ol into a mixed active carbonate derivative by treating it with bis(4-nitrophenyl)carbonate. The subsequent reaction of the active carbonate with an enantiomerically pure amine without using any base at ambient temperature provided enantiomerically pure solifenacin with an overall yield of 90%.

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Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 3564-73-6, Name is 10,11-Dihydro-5H-dibenzo[b,f]azepine-5-carboxamide, molecular formula is C15H14N2O. In an article, author is Brown, GR,once mentioned of 3564-73-6, SDS of cas: 3564-73-6.

Novel optimised quinuclidine squalene synthase inhibitors

Optimised quinuclidine squalene synthase (SQS) inhibitors are reported; 3-[2-(2-allyl-4-(2-ethoxy carbonylethyl)phenyl)ethynyl]quinuclidin-3-ol 1c, is a potent inhibitor of rat (KI = 6 nM) and human (KI = 43 nM) microsomal SQS; the oral ED(50) of 1c, for the inhibition of rat cholesterol biosynthesis was 1.3+/-0.45 mg/kg and for the R-enantiomer 1m, 0.8+/-0.2 mg/kg, with the corresponding R-carboxylic acid 6a, being 0.9+/-0.25 mg/kg. (C) 1997 Elsevier Science Ltd. All rights reserved.

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Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 6753-98-6, Name is (1E,4E,8E)-2,6,6,9-Tetramethylcycloundeca-1,4,8-triene, SMILES is C/C1=CCC(C)(C)/C=C/C/C(C)=C/CC1, belongs to quinuclidines compound. In a document, author is Navratil, O, introduce the new discover, Product Details of 6753-98-6.

Competitive extraction of some bases by carbollyl-cobaltate anion from water into chloroform

The bis[undecahydro-7,8-dicarbaundecaborato(2-)]cobaltate(1-) (X-) has been used for complementary study of its ionic associates with some cations of organic bases and quaternary salts. For the optimization of present analytical methods, quinuclidin-3-yl hydroxy(diphenyl)acetate, 1-(1-phenylcyclohexyl)piperidine, dibenzo[b,f][1,4]oxazepine and cocaine, were studied by competitive extraction method. X- labelled with Co-60 was used as carrier anion, triphenylmethane and azo dyes as competitive anions, The aqueous phase was 0.1 and 0.01 M HCl, the organic phase was chloroform. A comparison was made with earlier results obtained by extraction spectrophotometry.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 6753-98-6 is helpful to your research. Product Details of 6753-98-6.

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Quinuclidine – Wikipedia,
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Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 13139-15-6, Name is Boc-L-Leucine, molecular formula is , belongs to quinuclidines compound. In a document, author is Ugawa, T, COA of Formula: C11H21NO4.

Experimental model of escape phenomenon in hamsters and the effectiveness of YM-53601 in the model

1 The aim of this study was to establish an experimental model of the escape phenomenon, in which plasma cholesterol, initially reduced by a 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) reductase inhibitor such as pravastatin, increases again on long-term administration. We also evaluated the efficacy of YM-53601 ((E)-2-[2-fluoro-2- (quinuclidin-3-ylidene) ethoxy]-9H-carbazole monohydrochloride), a squalene synthase inhibitor, in this model. 2 Pravastatin inhibited cholesterol biosynthesis in hamster primary hepatocytes (IC50, 14 nM). After pre-treatment with pravastatin, in contrast, almost no effect on cholesterol biosynthesis was seen. 3 In hamsters fed a high fat diet, 3 mg kg(-1) pravastatin for 9 days decreased plasma non-HDL cholesterol (total cholesterol-high density lipoprotein cholesterol) (P<0.01), but this effect was lost between 17 and 27 days of treatment, accompanied by an increase in HMG-CoA reductase activity. No such increase in plasma non-HDL cholesterol was seen with YM-53601 at 30 mg kg(-1) after 9 (P<0.001), 17 (P<0.01) or 27 (P<0.001) days of treatment. Replacement of pravastatin with YM-53601 caused a decrease in plasma non-HDL cholesterol by 53% (P<0.001) and in HMG-CoA reductase activity. 4 This animal model thus satisfactorily replicates the escape phenomenon observed in humans and may therefore be useful in evaluation of lipid-lowering agents, specifically comparison of HMG-CoA reductase inhibitors. Further, YM-53601 may be useful in the treatment of hypercholesterolemia without induction of the escape phenomenon. Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 13139-15-6, in my other articles. COA of Formula: C11H21NO4.

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Quinuclidine – Wikipedia,
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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. 31906-04-4, Name is 4-(4-Hydroxy-4-methylpentyl)cyclohex-3-enecarbaldehyde, molecular formula is C13H22O2. In an article, author is Dolle, F,once mentioned of 31906-04-4, Formula: C13H22O2.

Highly efficient synthesis of [C-11]Me-QNB, a selective radioligand for the quantification of the cardiac muscarinic receptors using PET

Me-QNB (N-methyl-quinuclidin-3-yl benzilate or N-methyl-quinuclidin-3-yl diphenylhydroxy acetate) is a hydrophilic, non-metabolized and highly specific muscarinic acetylcholinergic antagonist. Using this quaternary ammonium derivative of QNB, labelled with carbon-11, a positron-emitting isotope (half-life : 20.4 minutes), the potential for quantification of myocardial muscarinic receptors in vivo using the high-resolution, sensitive and quantitative imaging technique PET (positron emission tomography) was previously demonstrated in dogs and validated in humans. In this paper, the radiosynthesis of carbon-11-labelled Me-QNB is investigated and oriented towards the preparation of multi milliCuries of radiotracer. Typically, using no-carrier-added [C-11]methyl triflate as the alkylating agent and 0.64 mg (1.89 mu mol) of QNB as precursor for labelling at 100 degreesC for 1 minute lead to a 48.5% +/- 10% (15 runs) decay-corrected radiochemical yield (based on [C-11]methyl triflate). 183 mCi (+/- 39) of [C-11]Me-QNB ([C-11]-1) could be synthesized in only 27 to 28 minutes after EOB and occasionally, up to 340 mCi of [C-11]Me-QNB ([C-11]-1) were obtained, corresponding to a 85% decay-corrected yield. The associated decay-corrected specific radioactivities obtained were 2658 mCi/mu mol (+/- 971) at EOB.

Interested yet? Keep reading other articles of 31906-04-4, you can contact me at any time and look forward to more communication. Formula: C13H22O2.

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Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 2386-53-0, Name is Sodium dodecane-1-sulfonate, molecular formula is , belongs to quinuclidines compound. In a document, author is Zhou, Rong, Name: Sodium dodecane-1-sulfonate.

Visible-Light-Mediated Metal-Free Hydrosilylation of Alkenes through Selective Hydrogen Atom Transfer for Si-H Activation

Although there has been significant progress in the development of transition-metal-catalyzed hydrosilylations of alkenes over the past several decades, metal-free hydrosilylation is still rare and highly desirable. Herein, we report a convenient visible-light-driven metal-free hydrosilylation of both electron-deficient and electron-rich alkenes that proceeds through selective hydrogen atom transfer for Si-H activation. The synergistic combination of the organophotoredox catalyst 4CzIPN with quinuclidin-3-yl acetate enabled the hydrosilylation of electron-deficient alkenes by selective Si-H activation while the hydrosilylation of electron-rich alkenes was achieved by merging photoredox and polarity-reversal catalysis.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 2386-53-0, in my other articles. Name: Sodium dodecane-1-sulfonate.

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Quinuclidine – Wikipedia,
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In an article, author is Prickaerts, Jos, once mentioned the application of 105-50-0, Name is Diethyl 1,3-acetonedicarboxylate, molecular formula is C9H14O5, molecular weight is 202.2045, MDL number is MFCD00009200, category is quinuclidines. Now introduce a scientific discovery about this category, Name: Diethyl 1,3-acetonedicarboxylate.

EVP-6124, a novel and selective alpha 7 nicotinic acetylcholine receptor partial agonist, improves memory performance by potentiating the acetylcholine response of alpha 7 nicotinic acetylcholine receptors

EVP-6124, (R)-7-chloro-N-quinuclidin-3-yl)benzo[b]thiophene-2-carboxamide, is a novel partial agonist of alpha 7 neuronal nicotinic acetylcholine receptors (nAChRs) that was evaluated here in vitro and in vivo. In binding and functional experiments, EVP-6124 showed selectivity for alpha 7 nAChRs and did not activate or inhibit heteromeric alpha 4 beta 2 nAChRs. EVP-6124 had good brain penetration and an adequate exposure time. EVP-6124 (0.3 mg/kg, p.o.) significantly restored memory function in scopolamine-treated rats (0.1 mg/kg, i.p.) in an object recognition task (ORT). Although donepezil at 0.1 mg/kg, p.o. or EVP-6124 at 0.03 mg/kg, p.o. did not improve memory in this task, co-administration of these sub-efficacious doses fully restored memory. In a natural forgetting test, an ORT with a 24 h retention time. EVP-6124 improved memory at 0.3 mg/kg, p.o. This improvement was blocked by the selective alpha 7 nAChR antagonist methyllycaconitine (0.3 mg/kg, i.p. or 10 mu g, i.c.v.). In co-application experiments of EVP-6124 with acetylcholine, sustained exposure to EVP-6124 in functional investigations in oocytes caused desensitization at concentrations greater than 3 nM, while lower concentrations (0.3-1 nM) caused an increase in the acetylcholine-evoked response. These actions were interpreted as representing a co-agonist activity of EVP-6124 with acetylcholine on alpha 7 nAChRs. The concentrations of EVP-6124 that resulted in physiological potentiation were consistent with the free drug concentrations in brain that improved memory performance in the ORT. These data suggest that the selective partial agonist EVP-6124 improves memory performance by potentiating the acetylcholine response of alpha 7 nAChRs and support new therapeutic strategies for the treatment of cognitive impairment. This article is part of a Special Issue entitled ‘Post-Traumatic Stress Disorder’. (C) 2011 Elsevier Ltd. All rights reserved.

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Quinuclidine – Wikipedia,
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