Tag: M.W:100-200

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 3222-47-7, is researched, Molecular C7H7NO2, about Enantioselective Synthesis of Dihydropyridines Containing Quaternary Stereocenters Through Dearomatization of Pyridinium Salts, the main research direction is dihydropyridine piperidine preparation enantioselective; pyridinium salt dearomatization rhodium BINAP catalyst.Synthetic Route of C7H7NO2.

Enantioselective synthesis of non-aromatic heterocycles containing a quaternary stereogenic center is a challenging synthetic problem. A strategy towards this problem involving dearomatization of N-alkylpyridinium salts using boronic acid nucleophiles have been described. This dearomatization reaction is catalyzed by Rhodium(I)/BINAP catalyst and delivers dihydropyridines that contain a fully substituted stereogenic center alpha to the ring nitrogen atom in high yield and enantioselectivity. The reaction is compatible with a wide range of functional groups such as halide, ester, amide, olefin and free alc. Derivatization of dehydropyridine products allows synthesis of the functionalized tetrahydropyridines and piperidines.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 6-Methylnicotinic acid, is researched, Molecular C7H7NO2, CAS is 3222-47-7, about Rhodium-catalyzed ortho-Arylation of (Hetero)aromatic Acids, the main research direction is carboxylate heteroaryl preparation; heteroaryl aryl carboxylic acid preparation regioselective methyl iodide esterification; bromide aryl heteroaryl carboxylic acid arylation.Electric Literature of C7H7NO2.

Rhodium acetate effectively promotes the carboxylate-directed ortho-arylation of (hetero)aromatic carboxylic acids ArCOOH (Ar = 2-methylphenyl, 4-methoxythiophen-3-yl, 2-fluoropyridin-3-yl, etc.) with aryl bromides Ar1Br (Ar1 = 4-methylphenyl, 2-naphthyl, 2-methylpyridin-6-yl, etc.) yielded functionalized hetero/aryl carboxylic acids, e.g., I (X = H, Me) and its Me carboxylates. The main advantage of this phosphine-free, redox-neutral method arises from its efficiency in assembling biol. meaningful electron-rich arylpyridines, which are problematic substrates in known C-H arylations using Pd, Ru, and Ir catalysts.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Application of 3222-47-7. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 6-Methylnicotinic acid, is researched, Molecular C7H7NO2, CAS is 3222-47-7, about Solvent-Dependent Chemoselective and Stereoselective Approach to Synthesis of Spiro-γ-Lactams with Potent Anticancer Activity. Author is Lei, Jie; He, Liu-Jun; Tang, Dian-Yong; Wen, Jingyuan; Yan, Wei; Li, Hong-yu; Chen, Zhong-Zhu; Xu, Zhi-Gang.

Chemoselective approaches were developed for derivatizing diastereoselective chromanone spiro-γ-lactams through the Michael-type addition by using amide as a weak nucleophile to construct the spiro-carbon center under basic conditions. To expand the scope of this post-Ugi cascade reaction, a new series of oxidized chromone derivatives Iand II [R1 = H, Me, Cl, etc.; R2 = Ph, 2-thienyl, 1,3-benzodioxol-5-yl, etc.; R3 = 2,6-dimethylphenyl, 4-methoxyphenyl, 1-naphthyl, etc.] was synthesized by altering solvent from EtOH to DMF. Compounds II [R1 = H; R2 = 1,3-benzodioxol-5-yl, 4-nitrophenyl; R3 = 2,6-dimethylphenyl] which could be synthesized in one day, demonstrated comparable anticancer activities with legendary anticancer drug paclitaxel in the PANC and U87 cell lines. This methodol. offers a new approach to construct spiro-carbon centers with functionalized chromanones or chromones under mild reaction conditions.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 6-Methylnicotinic acid, is researched, Molecular C7H7NO2, CAS is 3222-47-7, about Discovery of quinolone derivatives as antimycobacterial agents, the main research direction is quinolone preparation antimycobacterial.Recommanded Product: 3222-47-7.

In this report, a compound library was screened and identified compound I with antituberculosis activity and a minimal inhibitory concentration (MIC) against M. tuberculosis of 20μg mL-1. Structure optimization and the structure-activity relationship of 1 as the lead compound enabled the design and synthesis of a series of quinolone derivatives, e.g, II. These compounds were evaluated in vitro for anti-tubercular activity against the M. tuberculosis H37Rv strain. Among them, compounds III [n = 1; R = 3′,5′-dimethoxy-[1,1′-biphenyl], 4-(trifluoromethyl)phenyl, 6-(trifluoromethyl)pyridin-3-yl (IV)] exhibited MIC values in the range of 1.2-3μg mL-1 and showed excellent activity against the tested MDR-TB strain (MIC: 3, 2.9 and 0.9μg mL-1, resp.). All three compounds III were non-toxic toward A549 and Vero cells (>100 and >50μg mL-1, resp.). In addition, an antibacterial spectrum test carried out using compound (IV) showed that this compound specifically inhibits M. tuberculosis. These can serve as a new starting point for the development of anti-TB agents with therapeutic potential.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5-Chloro-6-methylpyrazine-2-carboxylic acid, is researched, Molecular C6H5ClN2O2, CAS is 188781-36-4, about MPX-004 and MPX-007: new pharmacological tools to study the physiology of nmda receptors containing the GluN2A subunit, the main research direction is NMDA receptor GluN2A antagonist pyramidal neuron synapsis.Synthetic Route of C6H5ClN2O2.

GluN2A is the most abundant of the GluN2 NMDA receptor subunits in the mammalian CNS. Physiol. and genetic evidence implicate GluN2A-containing receptors in susceptibility to autism, schizophrenia, childhood epilepsy and neurodevelopmental disorders such as Rett Syndrome. However, GluN2A-selective pharmacol. probes to explore the therapeutic potential of targeting these receptors have been lacking. Here we disclose a novel series of pyrazine-containing GluN2A antagonists exemplified byMPX-004 (5-(((3-chloro-4-fluorophenyl) sulfonamido)methyl)-N-((2-methylthiazol-5-yl)methyl)pyrazine-2-carboxamide) and MPX- 007 (5-(((3-fluoro-4-fluorophenyl)sulfonamido)methyl)-N-((2-methylthiazol-5-yl)methyl) methylpyrazine-2-carboxamide). MPX-004 and MPX-007 inhibit GluN2A-containing NMDA receptors expressed in HEK cells with IC50s of 79 nM and 27 nM, resp. In contrast, at concentrations that completely inhibited GluN2A activity these compounds have no inhibitory effect on GluN2B or GluN2D receptor-mediated responses in similar HEK cell-based assays. Potency and selectivity were confirmed in electrophysiol. assays in Xenopus oocytes expressing GluN2A-D receptor subtypes. Maximal concentrations of MPX-004 and MPX-007 inhibited ∼30%of the whole-cell current in rat pyramidal neurons in primary culture and MPX- 004 inhibited ∼60% of the total NMDA receptor-mediated EPSP in rat hippocampal slices. GluN2A-selectivity at native receptors was confirmed by the finding that MPX-004 had no inhibitory effect on NMDA receptor mediated synaptic currents in cortical slices from GRIN2A knock out mice. Thus, MPX-004 and MPX-007 offer highly selective pharmacol. tools to probe GluN2A physiol. and involvement in neuropsychiatric and developmental disorders.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3222-47-7, is researched, SMILESS is O=C(O)C1=CN=C(C)C=C1, Molecular C7H7NO2Journal, Article, Research Support, Non-U.S. Gov’t, Journal of Medicinal Chemistry called Structure-activity relationship studies of tolfenpyrad reveal subnanomolar inhibitors of Haemonchus contortus development, Author is Le, Thuy G.; Kundu, Abhijit; Ghoshal, Atanu; Nguyen, Nghi H.; Preston, Sarah; Jiao, Yaqing; Ruan, Banfeng; Xue, Lian; Huang, Fei; Keiser, Jennifer; Hofmann, Andreas; Chang, Bill C. H.; Garcia-Bustos, Jose; Wells, Timothy N. C.; Palmer, Michael J.; Jabbar, Abdul; Gasser, Robin B.; Baell, Jonathan B., the main research direction is tolfenpyrad Haemonchus contortus nematode parasiticide pharmacokinetics.HPLC of Formula: 3222-47-7.

Recently, we have discovered that the registered pesticide, tolfenpyrad, unexpectedly and potently inhibits the development of the L4 larval stage of the parasitic nematode Haemonchus contortus with an IC50 value of 0.03 μM while displaying good selectivity, with an IC50 of 37.9 μM for cytotoxicity. As a promising mol. template for medicinal chem. optimization, we undertook anthelmintic structure-activity relationships for this chem. Modifications of the left-hand side (LHS), right-hand side (RHS), and middle section of the scaffold were explored to produce a set of 57 analogs. Analogs I, II, and III were shown to be the most potent compounds of the series, with IC50 values at a subnanomolar level of potency against the chemotherapeutically relevant fourth larval (L4) stage of H. contortus. Selected compounds from the series also showed promising activity against a panel of other different parasitic nematodes, such as hookworms and whipworms.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《5-(p-Aminobenzenesulfonamido)thiazole》. Authors are Arnold, M. H. M.; Scaife, C. W..The article about the compound:5-Aminothiazole-2-carbonitrilecas:860182-74-7,SMILESS:N#CC1=NC=C(N)S1).COA of Formula: C4H3N3S. Through the article, more information about this compound (cas:860182-74-7) is conveyed.

5-Amino-2-thiazolethiocarboxamide (I) (chrysean of Wallach, Ber. 7, 902(1874)), m. 204° (decomposition), results in 25-g. yield by passing H2S (20-30 l./hr.) into saturated aqueous NaCN and a little NH4OH for 3-4 hrs.; acidification of the filtrate gives 30-40% (of the NaCN) of a reddish brown precipitate which decomposes on heating with H2O to give H2S and a black alkali-soluble tar. Many other methods were tried with yields not over 15-20%. I (10 g.) and 23.9 g. Pb(OAc)2 in 70 ml. H2O, refluxed 3 hrs., give 5-amino-2-thiazolecarbonitrile (II), m. 103° (Hellsing, Ber. 32, 1497(1899)). If the filtrate containing II is treated with CaCO3 in slight excess above that required to neutralize the AcOH and the mixture is refluxed 2 hrs., there results a good yield of 5-amino-2-thiazolecarboxamide, decomposes 156°. Hydrolysis of II with dilute HCl gives a small yield of 2-amino-2-thiazolecarboxylic acid, decomposes 185°; this could not be decarboxylated to 5-aminothiazole. II and BzH in EtOH give the 5-benzylideneamino compound, light yellow, m. 141°; this and the benzylidene derivative of I are too easily hydrolyzed for this method of protecting the NH2 group to be of any use. Attempts to diazotize I and II in the normal way gave highly colored tars, which appeared to be formed by intermol. condensation; II is diazotized by gradual addition of the solution to excess of HCl and NaNO2 at 0°; I has been diazotized by adding its solution in C5H5N to excess of NOCl in C6H6. I and p-O2NC6H4SO2Cl in C5H5N give the 5-(p-nitrophenylsulfonamido) compound, m. 185° (decomposition); the same derivative of II m. 148°. p-AcNHC6H4SO2Cl and I in C5H5N give the 5-(p-acetamidophenylsulfonamido) compound (III), m., 253-5° (decomposition); shaking with PbCO3 and refluxing the filtrate for 3 hrs. give a moderately good yield of 5-sulfanilamidothiazole (IV), m. 185° (decomposition). III is completely inactive against streptococcal infections and IV, although active, has no advantage over established sulfonamide drugs.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Singh, Vikram; Liu, Shuang; Ma, Pengtao; Drew, Michael G. B.; Wang, Jingping; Niu, Jingyang researched the compound: 6-Methylnicotinic acid( cas:3222-47-7 ).Reference of 6-Methylnicotinic acid.They published the article 《Versatile {Cp2Ti} Grafted Hetero-Polyoxotungstate Clusters: Synthesis, Crystal Structure, and Photocurrent Properties》 about this compound( cas:3222-47-7 ) in Inorganic Chemistry. Keywords: titanocene grafted phosphotungstate cluster preparation crystal mol structure photocurrent; crystal mol structure titanocene grafted phosphotungstate cluster. We’ll tell you more about this compound (cas:3222-47-7).

Polyoxotungstate supported titanocene {Cp2Ti}2+ clusters H6{K8(Cp2Ti)2P4W24O88(PO4)2}·14H2O (1), H6[Na2P4W14O58(Cp2Ti)2]·12H2O (2), and H2[K6{Cp2Ti}{PW9O33(WO2)}2{NC5H3(COOK)2}(NC5H3(CH3)COOK)·22H2O] (3) have been synthesized, and their single crystal x-ray structures have revealed unprecedented and intriguing structural features. The synthesized compounds have been characterized by various spectroscopic techniques including UV-vis, cyclic voltammogram, NMR, ESI-MS, and inductive coupled plasma spectroscopy (ICP) in solution and also by IR, TGA, and diffuse reflectance in the solid state. Clusters 1 and 2 are rare examples of lacunary POM supported titanocene clusters obtained by incorporating various phosphorus heteroatoms to form elusive phosphotungstate assemblies, whereas 3 is an unprecedented organometallic as well as heteroleptic pyridyl functionalized POM. Clusters 1-3 show transient photocurrent ON/OFF behavior upon UV-light irradiation and also exhibit characteristic TiIV/III intravalence electron transfer. This behavior is also established by their cyclic voltammograms in mixed phosphate buffers (Na2HPO4/NaH2PO4) which show the evidence of POM supported {Cp2Ti}2+/+ species in their redox solution Furthermore, ESR line broadening is also observed in these clusters at room temperature, a fact which also confirms the formation of partially reduced/oxidized {Cp2Ti}2+/+ species leading to TiIV/III intravalence electron transfers within all three clusters. The {Cp2Ti}2+ decorated polyoxometalate cluster 3 shows improved transient photocurrent behavior which may be due to the presence of pyridyl carboxyl ions which provide better surface contact for the cluster mol. through the carboxylate moiety to the ITO electrode.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Related Products of 3222-47-7. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 6-Methylnicotinic acid, is researched, Molecular C7H7NO2, CAS is 3222-47-7, about Catalytic enantioselective pyridine N-oxidation. Author is Hsieh, Sheng-Ying; Tang, Yu; Crotti, Simone; Stone, Elizabeth A.; Miller, Scott J..

The catalytic, enantioselective N-oxidation of substituted pyridines is described. The approach is predicated on a biomol.-inspired catalytic cycle wherein high levels of asym. induction are provided by aspartic-acid-containing peptides as the aspartyl side chain shuttles between free acid and peracid forms. Desymmetrizations of bis(pyridine) substrates bearing a remote pro-stereogenic center substituted with a group capable of hydrogen bonding to the catalyst are demonstrated. Our approach presents a new entry into chiral pyridine frameworks in a heterocycle-rich mol. environment. Representative functionalizations of the enantioenriched pyridine N-oxides further document the utility of this approach. Demonstration of the asym. N-oxidation in two venerable drug-like scaffolds, Loratadine and Varenicline, show the likely generality of the method for highly variable and distinct chiral environments, while also revealing that the approach is applicable to both pyridines and 1,4-pyrazines.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

Hsieh, Sheng-Ying; Tang, Yu; Crotti, Simone; Stone, Elizabeth A.; Miller, Scott J. published an article about the compound: 6-Methylnicotinic acid( cas:3222-47-7,SMILESS:O=C(O)C1=CN=C(C)C=C1 ).SDS of cas: 3222-47-7. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:3222-47-7) through the article.

The catalytic, enantioselective N-oxidation of substituted pyridines is described. The approach is predicated on a biomol.-inspired catalytic cycle wherein high levels of asym. induction are provided by aspartic acid-containing peptides as the aspartyl side chain shuttles between free acid and peracid forms. Desymmetrizations of bis(pyridine) substrates bearing a remote pro-stereogenic center are demonstrated, presenting a new entry into chiral pyridine frameworks in a heterocycle-rich mol. environment. Representative functionalizations of the enantioenriched pyridine N-oxides further document the utility of this approach. Demonstration of the asym. N-oxidation in two venerable drug-like scaffolds, Loratadine and Varenicline, show the likely generality of the method for highly variable and distinct chiral environments, while also revealing that the approach is applicable to both pyridines and 1,4-pyrazines.

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Reference:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics