Category: 33216-52-3

Safety of 3,4,5-Trichloropyridine. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 3,4,5-Trichloropyridine, is researched, Molecular C5H2Cl3N, CAS is 33216-52-3, about Concise synthesis of N-phosphorylated amides through three-component reactions. Author is Zhu, Yuan-Yuan; Zhang, Tao; Zhou, Linlin; Yang, Shang-Dong.

N-Phosphorylated amides continue to be an unparalleled asset for the development of pharmaceutical mols., and the importance of this framework has inspired researchers to look for concise and efficient methods for the synthesis of this unit. In this work, a new strategy was developed in which a one-pot synthesis of N-phosphorylated amides was achieved by a three-component reaction with carboxylic acids, phosphorus chlorides and azides under mild reaction conditions. To authors knowledge, this is the first study in which this framework was constructed through a multicomponent reaction, which is innovative, efficient and economical.

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Bromide – Wikipedia,
bromide – Wiktionary

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3,4,5-Trichloropyridine, is researched, Molecular C5H2Cl3N, CAS is 33216-52-3, about Gas-phase thermochemistry of chloropyridines, the main research direction is chloropyridine formation enthalpy metal cation affinity.Synthetic Route of C5H2Cl3N.

The gas-phase standard molar enthalpy of formation of 2,3,5-trichloropyridine was derived from the enthalpies of combustion of the crystalline solid measured by rotating-bomb calorimetry and its enthalpy of sublimation obtained by Calvet microcalorimetry at T = 298.15 K. The standard enthalpies of formation for this compound and for the other chloro-substituted pyridines were determined by DFT calculations The exptl. enthalpy of formation of 2,3,5-trichloropyridine is (65.8 ± 2.3) kJ mol-1, in excellent agreement with the B3LYP/6-311+G(2d,2p)//B3LYP/6-31G(d) value. The affinity of pyridine to some metal cations was also calculated at the same DFT level of theory and compared with exptl. data.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3,4,5-Trichloropyridine, is researched, Molecular C5H2Cl3N, CAS is 33216-52-3, about Discovery of Potent, Orally Bioavailable, Small-Molecule Inhibitors of WNT Signaling from a Cell-Based Pathway Screen, the main research direction is trisubstituted pyridine preparation bioavailability WNT signaling inhibitor antitumor.Application In Synthesis of 3,4,5-Trichloropyridine.

WNT signaling is frequently deregulated in malignancy, particularly in colon cancer, and plays a key role in the generation and maintenance of cancer stem cells. The authors report the discovery and optimization of a 3,4,5-trisubstituted pyridine, 1-(3,5-Dichloropyridin-4-yl)piperidine-4-carboxamide (9), using a high-throughput cell-based reporter assay of WNT pathway activity. The authors demonstrate a twisted conformation about the pyridine-piperidine bond of (9) by small-mol. x-ray crystallog. Medicinal chem. optimization to maintain this twisted conformation, cognisant of physicochem. properties likely to maintain good cell permeability, led to 8-[3-Chloro-5-[4-(1-methyl-1H-pyrazol-4-yl)phenyl]pyridin-4-yl]-2,8-diazaspiro[4,5]decan-1-one (74) (CCT251545), a potent small-mol. inhibitor of WNT signaling with good oral pharmacokinetics. The authors demonstrate inhibition of WNT pathway activity in a solid human tumor xenograft model with evidence for tumor growth inhibition following oral dosing. This work provides a successful example of hypothesis-driven medicinal chem. optimization from a singleton hit against a cell-based pathway assay without knowledge of the biochem. target.

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Recommanded Product: 33216-52-3. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 3,4,5-Trichloropyridine, is researched, Molecular C5H2Cl3N, CAS is 33216-52-3, about Selective Dual Inhibitors of the Cancer-Related Deubiquitylating Proteases USP7 and USP47. Author is Weinstock, Joseph; Wu, Jian; Cao, Ping; Kingsbury, William D.; McDermott, Jeffrey L.; Kodrasov, Matthew P.; McKelvey, Devin M.; Suresh Kumar, K. G.; Goldenberg, Seth J.; Mattern, Michael R.; Nicholson, Benjamin.

Inhibitors of the cancer-related cysteine isopeptidase human ubiquitin-specific proteases 7 (USP7) and 47 (USP47) are considered to have potential as cancer therapeutics, owing to their ability to stabilize the tumor suppressor p53 and to decrease DNA polymerase β (Polβ), both of which are potential anticancer effects. A new class of dual small mol. inhibitors of these enzymes has been discovered. Compound 1 (I), a selective inhibitor of USP7 and USP47 with moderate potency, demonstrates inhibition of USP7 in cells and induces elevated p53 and apoptosis in cancer cell lines. Compound 1 has been shown to demonstrate modest activity in human xenograft multiple myeloma and B-cell leukemia in vivo models. This activity may be the result of dual inhibition of USP7 and USP47. To address issues regarding potency and developability, analogs of compound 1 have been synthesized and tested, leading to improvements in potency, solubility, and metabolic reactivity profile. Further optimization is expected to yield preclin. candidates and, ultimately, clin. candidates for the treatment of multiple myeloma, prostate cancer, and other cancers.

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Bromide – Wikipedia,
bromide – Wiktionary

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Pyridine and quinoline derivatives. XLI. Chlorination of pyridine》. Authors are Wibaut, J. P.; Nicolai, J. R..The article about the compound:3,4,5-Trichloropyridinecas:33216-52-3,SMILESS:C1=NC=C(C(=C1Cl)Cl)Cl).Computed Properties of C5H2Cl3N. Through the article, more information about this compound (cas:33216-52-3) is conveyed.

Passing 1.9 moles of C5H5N (I), 0.36 mole N and 2.8 moles Cl through a Cu tube at 270° for 7.25 hr. gives about 0.59 mole of 2-chloropyridine (II) (46% on I consumed) and about 2 g. of 2,6-dichloropyridine (III); there is also present a small quantity of a pyridylpyridinium compound, since hydrolysis yields 2-aminopyridine (IV). At 400° the main product is III. Chlorination in the gas phase takes place very slowly at about 200°; the products are 3,5-di-Cl and 3,4,5-tri-Cl derivatives of I. Chlorination of fused I.HCl at about 170° gives a considerable yield of the 3,5-di-Cl derivative of I, together with a small quantity of the 3,4,5-tri-Cl derivative and the penta-Cl derivative; addition of HgCl2 had no effect upon the type of substitution or yield of products obtained. Heating 6 g. of III with 20% NH4OH a 180-90° for 40 hrs. gives 2.6 g. of 6-chloro-2-aminopyridine, m. 75°. Heating 4 g. I with 20% NH4OH and 2 g. CuSO4 at 180-90° for 20 hrs. gives 1 g. IV.

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called The First trans-Configured Cyclopalladated Amine, published in 2005-10-24, which mentions a compound: 33216-52-3, mainly applied to trans configured cyclopalladated amine preparation crystal mol structure; aminoethylphenyl trichloropyridine palladium orthopalladated preparation crystal mol structure, Application In Synthesis of 3,4,5-Trichloropyridine.

More than 100 ortho-palladated neutral arylamines with two addnl. monodentate ligands, namely, a N- or P-bonded Lewis base L and a mononeg. ligand X, correspond to the cis configuration with respect to their Pd-C and Pd-L bonds. In contrast, (S)-[2-(1-aminoethyl)phenyl-κ2C1,N]chloro(3,4,5-trichloropyridine-κN)palladium(II) represents the first structurally characterized trans-configured complex of this class.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 3,4,5-Trichloropyridine(SMILESS: C1=NC=C(C(=C1Cl)Cl)Cl,cas:33216-52-3) is researched.Synthetic Route of C17H18Cl2N2. The article 《Nature of the Nucleophilic Oxygenation Reagent Is Key to Acid-Free Gold-Catalyzed Conversion of Terminal and Internal Alkynes to 1,2-Dicarbonyls》 in relation to this compound, is published in Journal of Organic Chemistry. Let’s take a look at the latest research on this compound (cas:33216-52-3).

2,3-Dichloropyridine N-oxide, a novel oxygen transfer reagent, allows the conductance of the gold(I)-catalyzed oxidation of alkynes to 1,2-dicarbonyls in the absence of any acid additives and under mild conditions to furnish the target species, including those derivatized by highly acid-sensitive groups. The developed strategy is effective for a wide range of alkyne substrates such as terminal- and internal alkynes, ynamides, alkynyl ethers/thioethers, and even unsubstituted acetylene (40 examples; yields up to 99%). The oxidation was successfully integrated into the trapping of reactive dicarbonyls by one-pot heterocyclization and into the synthesis of six-membered azaheterocycles. This synthetic acid-free route was also successfully applied for the total synthesis of a natural 1,2-diketone.

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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: 33216-52-3, is researched, Molecular C5H2Cl3N, about Radical Mediated C-H Functionalization of 3,6-Dichloropyridazine: Efficient Access to Novel Tetrahydropyridopyridazines, the main research direction is dichloropyridazine primary alc radical addition titanium trichloride tertbutyl hydroperoxide; chloropyridazinyl alkanol primary amine heterocyclization; tetrahydropyridopyridazine preparation mol crystal structure.Recommanded Product: 33216-52-3.

A radical mediated C-H functionalization of 3,6-dichloropyridazine using primary alcs., t-BuOOH, and TiCl3 to access alkoxy pyridazines is described. This transformation is conducted open to air and on gram scale. A subsequent cyclization step can then be employed to efficiently access diversely substituted tetrahydropyridopyridazines, e.g., I (X-rays single crystal structure shown), with multiple functional handles.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 3,4,5-Trichloropyridine, is researched, Molecular C5H2Cl3N, CAS is 33216-52-3, about Survey and qualification of internal standards for quantification by 1H NMR spectroscopy.Application In Synthesis of 3,4,5-Trichloropyridine.

In quant. NMR (qNMR) selection of an appropriate internal standard proves to be crucial. In this study, 25 candidate compounds considered to be potent internal standards were investigated with respect to the ability of providing unique signal chem. shifts, purity, solubility, and ease of use. The 1H chem. shift (δ) values, assignments, multiplicities and number of protons (for each signal), appropriateness (as to be used as internal standards) in four different deuterated solvents (D2O, DMSO-d6, CD3OD, CDCl3) were studied. Taking into account the properties of these 25 internal standards, the most versatile eight compounds (2,4,6-triiodophenol, 1,3,5-trichloro-2-nitrobenzene, 3,4,5-trichloropyridine, di-Me terephthalate, 1,4-dinitrobenzene, 2,3,5-triiodobenzoic acid, maleic acid, and fumaric acid) were qualified using both differential scanning calorimetry (DSC) and NMR spectroscopy employing highly pure acetanilide as the reference standard The data from these two methods were compared as well as utilized in the quality assessment of the compounds as internal standards Finally, the selected internal standards were tested and evaluated in a real case of quant. NMR anal. of a paracetamol pharmaceutical product.

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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: 33216-52-3, is researched, SMILESS is C1=NC=C(C(=C1Cl)Cl)Cl, Molecular C5H2Cl3NJournal, Tetrahedron called Microwave-assisted synthesis of 4-amino-3,5-dihalopyridines, Author is Pichowicz, Mark; Crumpler, Simon; McDonald, Edward; Blagg, Julian, the main research direction is amino halopyridine preparation; microwave assisted nucleophilic aromatic substitution halopyridine primary secondary amine.Application In Synthesis of 3,4,5-Trichloropyridine.

4-Amino-3,5-dihalopyridines have been efficiently prepared via microwave-assisted nucleophilic aromatic substitution of 3,4,5-trihalopyridines using 1-1.1 equiv of primary and secondary amines. The reaction is also applicable to electron rich arylamines.

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