Tag: M.W:200-300

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 Microwave-Assisted Tandem Kornblum Oxidation and Biginelli Reaction for the Synthesis of Dihydropyrimidones, published in 2020-10-19, which mentions a compound: 16004-15-2, mainly applied to dihydropyrimidone dihydro pyrimidinethione preparation green chem microwave irradiation; urea aralkyl bromide ethyl acetoacetate tandem Kornblum Biginelli cyclocondensation; thiourea aralkyl bromide ethyl acetoacetate tandem Kornblum Biginelli cyclocondensation, HPLC of Formula: 16004-15-2.

A simple and straightforward approach for the synthesis of dihydropyrimidones I (X = O, S; Ar = Ph, 4-FC6H4, pyridin-2-yl, 1H-pyrrol-2-yl, etc.) via sequential Kornblum oxidation/Biginelli reaction has been developed. The protocol involves an in situ oxidation of benzyl bromides ArCH2Br which serve as a carbonyl equivalent followed by cyclocondensation with (thio)urea and Et acetoacetate to furnish dihydropyrimidones I under catalyst- and base-free conditions in a one-pot tandem manner under microwave irradiation Further, the product purification using aqueous recrystallization avoids large quantities of volatile and a toxic organic solvent usually required for work-up and significantly less time required for this process makes the method environmentally friendly.

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Related Products of 18583-60-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about Chalcogen Atom Transfer to a Metal Nitrido. The First Transition Metal Selenonitrosyl Complex. Author is Crevier, Thomas J.; Lovell, Scott; Mayer, James M.; Rheingold, Arnold L.; Guzei, Ilia A..

A homologous series of chalconitrosyls, TpOs(NE)Cl2 (E = O (2), S (3), Se (4); Tp = hydrotris(1-pyrazolyl)borate), including the 1st example of a transition metal selenonitrosyl complex, were prepared and characterized by 15N NMR and IR spectra and single crystal x-ray diffraction analyses of 2 and 4. Compounds 2-4 were prepared by atom transfer to the terminal nitrido complex TpOsNCl2.

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Reference:
Piperazine – Wikipedia,
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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.Sun, Chao-De; Wong, Wing Tak researched the compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ).Computed Properties of C9H10BKN6.They published the article 《Heteroleptic polypyrazolylborate complexes of the lanthanides: syntheses and molecular structures of [Nd{HB(pz)3}2Cl(H2O)] (HB(pz)3 = hydrotris(pyrazol-1-yl)borate) and [Nd{HB(pz*)3}LCl2] (HB(pz*)3 = hydrotris(3,5-dimethylpyrazol-1-yl)borate; L = 4,4′-di-tert-butyl-2,2′-bipyridine)》 about this compound( cas:18583-60-3 ) in Inorganica Chimica Acta. Keywords: crystal structure neodymium pyrazolylborate chloro heteroleptic; neodymium pyrazolylborate bipyridine chloro complex preparation. We’ll tell you more about this compound (cas:18583-60-3).

The new heteroleptic hydrotris(pyrazol-1-yl)borate lanthanide complex [Nd{HB(pz)3}2Cl] (1) was prepared from the reaction between anhydrous NdCl3 and 2 equiv of K[HB(pz)3] in THF at room temperature The H2O adduct of 1, [Nd{HB(pz)3}2Cl(H2O)]·THF (2), is formed when a solution of 1 is allowed to stand at room temperature in the presence of moisture. Reaction of K[HB(pz*)3] with anhydrous NdCl3 in the presence of 4,4′-di-tert-butyl-2,2′-bipyridine (L) yields [Nd{HB(Pz*)3}LCl2] (3) in moderate yield. All complexes were characterized by conventional spectroscopic methods. The mol. structures of 2 and 3 were determined by x-ray crystallog.

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Piperazine – Wikipedia,
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Name: Potassiumtris(1-pyrazolyl)borohydride. 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: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about Single molecule magnet: Heterodinuclear cyano-bridged cubic cluster [(Tp)8Fe4Ni4(CN)12] (Tp=hydrotris(1-pyrazolyl)borate). Author is Kim, Jinkwon; Han, Sujin; Lim, Jin Mook; Choi, Kwang-Yong; Nojiri, Hiroyuki; Suh, Byoung Jin.

The octanuclear cyano-bridged cluster [(Tp)8Fe4Ni4(CN)12].H2O.24CH3CN (1) (Tp = hydrotris(1-pyrazolyl)borate) showing magnetic properties of single-mol. magnet has been synthesized by reaction of [fac-Fe(Tp)(CN)3]- with {(Tp)Ni(NO3)} species formed from an equimolar reaction mixture of Ni(NO3)2 · 6H2O and KTp in MeCN. The X-ray anal. of 1 shows mol. cube structure in which FeIII and NiII ions reside in alternate corners. The average intramol. Fe···Ni distance is 5.124 Å. Out-of-phase ac susceptibility and reduce magnetization measurements show that 1 is a single mol. magnet with ground spin state S = 6 and spin reversal energy barrier U = 14 K. Magnetic hysteresis loops were also observed by applying fast sweeping field.

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Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Tang, Meizhong; Han, Shuxiong; Huang, Shenglan; Huang, Shenlin; Xie, Lan-Gui published the article 《Carbosulfenylation of Alkenes with Organozinc Reagents and Dimethyl(methylthio)sulfonium Trifluoromethanesulfonate》. Keywords: alkene organozinc reagent dimethylmethylthiosulfonium trifluoromethanesulfonate carbosulfenylation; sulfide preparation.They researched the compound: 1-(Bromomethyl)-4-iodobenzene( cas:16004-15-2 ).Reference of 1-(Bromomethyl)-4-iodobenzene. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:16004-15-2) here.

The electrophilic alkylthiolation of alkenes, initiated by dimethyl(methylthio)sulfonium salts and the subsequent addition of various heteronucleophilies has been well-established. Regarding the use of carbon nucleophiles, however, only carefully designed sp-type carbon sources have been successfully applied. We herein present our findings on the methylthiolation of alkenes with dimethyl(methylthio)sulfonium trifluoromethanesulfonate, followed by carbon-carbon bond formation in the presence of organozinc reagents, thus achieving a catalyst-free protocol toward to the carbosulfenylation of alkenes.

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Category: piperazines. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1-(Bromomethyl)-4-iodobenzene, is researched, Molecular C7H6BrI, CAS is 16004-15-2, about Adsorption and corrosion inhibition behaviour of new theophylline-triazole-based derivatives for steel in acidic medium. Author is Espinoza-Vazquez, Araceli; Rodriguez-Gomez, Francisco Javier; Martinez-Cruz, Ivonne Karina; Angeles-Beltran, Deyanira; Negron-Silva, Guillermo E.; Palomar-Pardave, Manuel; Romero, Leticia Lomas; Perez-Martinez, Diego; Navarrete-Lopez, Alejandra M..

The design and synthesis of a series of theophylline derivatives containing 1,2,3-triazole moieties are presented. The corrosion inhibition activities of these new triazole-theophylline compounds were evaluated by studying the corrosion of API 5 L X52 steel in 1 M HCl medium. The results showed that an increase in the concentration of the theophylline-triazole derivatives also increases the charge transference resistance (Rct) value, enhancing inhibition efficiency and decreasing the corrosion process. The electrochem. impedance spectroscopy under static conditions studies revealed that the best inhibition efficiencies (approx. 90%) at 50 ppm are presented by the all-substituted compounds According to the Langmuir isotherm, the compounds 4 and 5 analyzed exhibit physisorption-chemisorption process, with exception of the hydrogen 3, bromo 6 and iodo 7 substituted compounds, which exhibit chemisorption process. The corrosion when submerging a steel bar in 1 M HCl was studied using SEM-EDS. This experiment showed that the corrosion process decreases considerably in the presence of 50 ppm of the organic inhibitors.

Here is just a brief introduction to this compound(16004-15-2)Category: piperazines, more information about the compound(1-(Bromomethyl)-4-iodobenzene) is in the article, you can click the link below.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-(Bromomethyl)-4-iodobenzene(SMILESS: IC1=CC=C(CBr)C=C1,cas:16004-15-2) is researched.Name: 5-Methylfuran-2(3H)-one. The article 《One-pot sequential synthesis and antifungal activity of 2-(benzylsulfonyl)benzothiazole derivatives》 in relation to this compound, is published in RSC Advances. Let’s take a look at the latest research on this compound (cas:16004-15-2).

A series of 2-(benzylsulfonyl)benzothiazoles I [R = H, 4-F, 2-I, etc.; X = S] was synthesized by an environmentally friendly method, using water as reaction medium via one-pot and two-step procedure, starting from 2-mercaptobenzothiazole and benzyl halides. Few compounds of 2-(benzylsulfonyl)benzoxazoles I [X = O] were successfully synthesized via oxidation of 2-(benzoxazolyl)benzylsulfides. The potential fungicides were tested against a panel of phytopathogenic fungi, with many of them showing a significant improvement compared to the non-oxidized analogs and the com. antifungal Captan. The new derivatives I [R = 4-Me, 2-Cl; X = S] presented remarkable properties, being able to inhibit the growth of two resistant molds (A. fumigatus and A. ustus). Compounds I [R = 4-Me, 2-Cl; X = S] could be classified as broad-spectrum fungicides, emerging as possible candidates for the control of these molds, which had neg. impact in food production

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Tuning the Cell Uptake and Subcellular Distribution in BODIPY-Carboranyl Dyads: An Experimental and Theoretical Study, published in 2020-12-11, which mentions a compound: 16004-15-2, Name is 1-(Bromomethyl)-4-iodobenzene, Molecular C7H6BrI, Product Details of 16004-15-2.

A set of BODIPY-carboranyl dyads synthesized by a Sonogashira cross-coupling reaction, where different C-substituted ortho- and meta-carboranyl fragments have been linked to a BODIPY fluorophore is described. Chem., photophys. and physicochem. analyses are presented, including NMR and single XRD experiments, optical absorption/emission studies and partition coefficient (log P) measurements. These studies, supported by DFT computations (M06-2X/6-31G**), provide an explanation to the largely divergent cell income that these fluorescent carboranyl-based fluorophores display, for which a structural or physicochem. explanation remains elusive. By studying the cell uptake efficiency and subcellular localization for our set of dyads on living HeLa cells, we tracked the origins of these differences to significant variations in their static dipole moments and partition coefficients, which tune their ability to interact with lipophilic microenvironments in cells. Remarkably, m-carboranyl-BODIPY derivatives with a higher lipophilicity are much better internalised by cells than their homologous with o-carborane, suggesting that m-isomers are potentially better theranostic agents for in vitro bioimaging and boron carriers for boron neutron capture therapy.

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Piperazine – Wikipedia,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3-Iodo-1H-indazol-5-amine, is researched, Molecular C7H6IN3, CAS is 599183-36-5, about 2,4-Diaminopyrimidine MK2 inhibitors. Part II: Structure-based inhibitor optimization, the main research direction is diaminopyrimidine MK2 inhibitor preparation structure inhibitor.Related Products of 599183-36-5.

We describe structure-based optimization of a series of novel 2,4-diaminopyrimidine MK2 inhibitors. Co-crystal structures (see accompanying Letter) demonstrated a unique inhibitor binding mode. Resulting inhibitors had IC50 values as low as 19 nM and moderate selectivity against a kinase panel. Compounds 15, 31a, and 31b inhibit TNFα production in peripheral human monocytes.

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Piperazine – Wikipedia,
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Application In Synthesis of Potassiumtris(1-pyrazolyl)borohydride. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about [Hydridotris(pyrazol-1-yl)borato-κ3N,N’,N”][5,10,15,20-tetrakis(4-methylphenyl)porphyrinato-κ4N,N’,N”,N”’]samarium(III) toluene 1.75-solvate. Author is He, Hongshan; He, Guishan; Ng, Seik Weng.

In the title complex, [Sm(C9H10BN6)(C48H36N4)]·1.75C7H8, there are two independent complex mols. in the asym. unit, in each of which the SmIII ion is coordinated by seven N atoms, four from a (4-methylphenyl)porphyrinate ligand and three from a hydridotris(pyrazol-1-yl)borate ligand, to form a capped trigonal-prismatic geometry. The SmIII ion is ‘sandwiched’ between two ligands and is located 1.2647(13) and 1.2549(14)Å from the porphyrin ring in the two complex mols. The asym. unit also contains 3.5 mols. of toluene, the half-occupancy mol. being located close to a crystallog. inversion center. The porphyrin groups have ‘dome’-like geometries.

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics